factjuice / body

Facts about the Human Body

1,042 topics in this category

What's inside you, and what it's doing right now. 1,042 topics. Squeeze any one of them for a fresh fact.

AB negative blood type AB positive blood type Abducens nerve ABO gene mutations Accessory nerve Acetabular cartilage Acetabulofemoral joint Acetylcholine Receptor Acetylcholinesterase Function Achilles tendon Acid-Base Balance Acromioclavicular joint Action Potential Action Potential Mechanism Adaptive Immune System Adductor brevis Adductor longus Adductor magnus Adipocyte Adipose Tissue Adipose Tissue Functions Adrenal cortex the Adrenal Glands Adrenal medulla Adrenaline Aging Aldosterone Secretion Alveolar epithelium Alveolar Gas Exchange Alveolar Macrophages in the Respiratory System Alveolar-Capillary Barrier Alveolar-Capillary Membrane Alveoli Function Alveolus Anal glands Anastomosis in Surgery Anatomy of the Human Eye Anatomy of the Human Hand Anterior cruciate ligament Anterior interosseous nerve Anterior pituitary Anterior talofibular ligament Antibodies Antibody-Mediated Immunity Aortic Arch Variations Apgar Score Apocrine sweat glands Aponeurosis Apoptosis the Appendix Appendix Function Aqueous humor Arrector Pili Muscle The Art of Trepanning Articular cartilage Articular Cartilage Function Articular Cartilage Structure Astrocytes in Nervous System Atlantoaxial joint Atlas Atrioventricular node Auditory Cochlea Auditory Cortex Auditory Pathway Auditory Transduction Auriculotemporal nerve Autologous blood transfusion Autonomic Nervous System Autonomic Nervous System Divisions Autonomic Nervous System Functions Axillary nerve Axis Axon B-Cell Activation Bartholin glands Basal Ganglia Pathways Basal Metabolic Rate Basilar membrane Bell Curves and Intelligence Debate Beta Cell Biceps brachii Biceps femoris Bicuspid valve Bile Canaliculus Bile Production Bile Synthesis and Secretion Bioelectricity Biological Clock and Human Circadian Rhythms Biological Rhythms and Circadian Clock Biology of Naked Mole Rats Biology of Platypus Reproduction Biomechanics of Human Walking Bizarre Human Parasites Blood Blood bank compatibility testing Blood Clotting Process Blood tissue Blood type A secretors Blood type and bone density Blood type and COVID-19 severity Blood type and fertility Blood type and heart disease Blood type and malaria resistance Blood type and personality theory Blood type and plague susceptibility Blood type and stroke risk Blood type and transfusion reactions Blood type antibodies Blood type diet theory Blood type genetic mutations Blood type in forensic investigation Blood type incompatibility in pregnancy Blood type inheritance patterns Blood type O secretors Blood type screening tests Blood-Brain Barrier Function Blood-Brain Barrier Permeability Blood-Brain Barrier Protection Bombay phenotype blood type Bone Marrow Bone Marrow and Blood Cell Production Bone Remodeling Process Bones Bowman's capsule Bradford Reagent the Brain Brain and Cerebral Cortex Functions Brainstem Broca's Area and Speech Broca's Area Function Bronchial tissue Bronchial Tree Bronchiole Bronchus Brown Adipose Tissue Brunner's Gland Brunner's glands Buccal glands Buccal nerve Bulbourethral glands Bursa Calcaneofibular ligament Calcaneus Calcium Capillary Action in Humans Capitate Carbohydrates Cardiac Conduction System Cardiac Cycle Cardiac Cycle Phases Cardiac Electrical Conduction Cardiac Electrophysiology Cardiac glands of stomach Cardiac muscle Cardiac myocytes Cardiac septum Carpals Cartilage Growth Cell-Mediated Immunity Cells Cellular Respiration Process Cementum Cephalocaudal Development Cerebellar Peduncles Cerebral Cortex Function Cerebrospinal Fluid Cerumen Cerumen Production Ceruminous Gland Ceruminous glands Cervical facet joint Cervical Spine Anatomy and Function Cervical Vertebra Cervical Vertebrae Chief cells Chondrocytes Chorda tympani Choroid Choroid Plexus Chromosomes Cilia and Flagella Difference Cilia Function Ciliary body Ciliary Body Eye Functions Ciliary glands Ciliary Movement Circadian Rhythm Circadian Rhythm and Sleep-Wake Cycle Circadian Rhythm Cycle Circadian Rhythm Influence on Body Circadian Rhythm Regulation Circadian Rhythms the Circulatory System Circulatory System Functions Circulatory System Pathway Clavicle Clostridium Difficile Superbug Coagulation Cascade Coccyx Cochlea Cochlear Implant Technology Cognitive Development Collecting duct Colon glands Colton antigen blood group Common peroneal nerve Compact bone Composition and Functions of Saliva Cone cells Conjunctiva Coracoacromial ligament Coracoclavicular ligament Cornea Corneal epithelium Corneal Structure Coronary artery Cortical Homunculus Cortical Homunculus Explanation Corticospinal Tract Corticosteroid Cortisol Cowper's Gland Cranial Nerve Cranial Nerve Functions Cranial Nerves Cricoid Cartilage Cross matching procedures Crypts of Lieberkuhn Cuboid Cutaneous Sensation Cytokine The Dancing Plague of 1518 Darwin's Tubercle in Humans Deep peroneal nerve Deep petrosal nerve Deltoid Deltoid ligament Deltoid Muscle Dental Anatomy and Development Dental pulp Dentin Dentinogenesis Dermal Papillae Function Dermis Developmental Stages of the Human Embryo the Diaphragm Diego blood group system Digestive Enzymes and Their Functions the Digestive System Directed blood donations Disease-Scarred Bones in History Distal interphalangeal joint Distal radioulnar joint Distal tubule DNA Dombrock antigen blood group Dopamine Dorsal scapular nerve Dreams Duffy antigen system Duodenal glands Duodenum Duodenum Structure the Ears Eccrine sweat glands Effect of Sleep on Brain Elastic cartilage Electrical Conduction System of the Heart Electrocardiogram ECG Emergence of Antimicrobial Resistance Emergence of Gene Drive Technologies Enamel The Endocannabinoid System Endocardium Endocrine Disruptors Endocrine Disruptors and Hormonal Balance Endocrine Feedback Loops Endocrine Gland Endocrine Glands Endocrine Glands and Their Hormones the Endocrine System Endocrine System Major Glands Endocrine System Regulation Endolymphatic Sac Endomysium Endoplasmic Reticulum Endorphins Endothelial cells Endothelial layer Enteric Nervous System Enzymatic Digestion Process Eosinophil Epicardium Epidermis Epigenetic Changes in Humans Epigenetic Marks Epigenetic Modification in Genes Epigenetic Regulation Epiglottis Epiphyseal Plate Epiphysis Epithelial Tissue Erythrocyte Degradation Erythrocyte Senescence Erythropoiesis Erythropoietin Esophageal epithelium Esophageal Peristalsis the Esophagus Ethical Implications of CRISPR Ethmoid Eustachian Tube Eustachian Tube Function Extensor carpi radialis Extensor carpi ulnaris Extensor digitorum longus External oblique Eyelid Anatomy the Eyes Facial nerve Fallopian Tube Fascia layer Feedback Mechanisms in Endocrinology Femoral nerve Femur Fermentation Fetal Microchimerism Fiber Fibroblasts Fibrocartilage Fibula Fibularis brevis Fibularis longus Fingernails Fingerprints Flexor carpi radialis Flexor carpi ulnaris Flexor digitorum longus Floating Ribs Foramen Magnum Fovea Centralis Frontal Function and Composition of Blood Function of Hormones in Homeostasis Function of Kidney Nephrons Function of Platelets Function of the Immune System Function of the Pancreas Function of the Spleen Function of the Spleen in Immunity Function of the Thyroid Gland Fundic glands Gametogenesis Gas Exchange in Lungs Gas Exchange in the Alveoli Gastric Emptying Gastric gland Gastric Mucosa Gastric Pit Anatomy Gastrocnemius Gastrocolic Reflex Gastrointestinal Microbiota Gene Editing CRISPR Genes Genetic Chimerism in Humans Genitofemoral nerve Gingiva Glands of Moll Glenohumeral ligament Glenoid cartilage Glial Cell Glial Cell Line-Derived Neurotrophic Factor Glial Cell Types Glial Cells Glisson's Capsule Glomerular Filtration Rate Glomerulus The Glomerulus and Filtration Glomus Body Glomus Tumor Glossopharyngeal nerve Gluteus maximus Gluteus medius Gluteus minimus Glymphatic System Goblet Cell Goblet cells Gracilis Gray matter Great auricular nerve Greater occipital nerve Greater petrosal nerve Growth Gustatory Pathway the Gut Microbiome Gut-Brain Axis Hair Hair cells of the cochlea Hair follicle Hair Follicle Cycle Hair follicle stem cells Hair Growth Cycles Hamate Haversian Canal Haversian System the Heart Hematopoiesis Hemispheric Lateralization in Brain Hemoglobin Hemoglobin Function Hemoglobin Molecule Mechanism Hemoglobin Oxygen Binding Hemoglobin Oxygen Transport Hemoglobin: Function and Structure Hemolytic disease of the newborn Hemophilia: The Royal Disease Hepatic Lobules Hepatic Portal Circulation Hepatic Portal System Hepatic tissue Hepatocytes Heredity and Genetics Hering-Breuer Reflex Histamine Function Homeostasis Hormesis Hormonal Control of Bone Growth Hormonal Endocrinology Hormonal Feedback Loops Hormonal Imbalance Hormonal Regulation Hormonal Regulation of the Menstrual Cycle How Do Muscle Contractions Work Human Circulatory System Human Digestive Enzymes Human Evolution: Recent Adaptations Human Genome Project Findings Human Microbiome Human Respiratory Exchange Human Skin Layers and Functions Human Spinal Cord and Nerve Pathways Humeroradial joint Humeroulnar joint Humerus Humoral Immunity Huntington's Disease Genetics Hyaline cartilage Hyoid Hyoid Bone Hypodermis Hypoglossal nerve Hypothalamic-Pituitary Axis Hypothalamus Hypothalamus Function The Hypothalamus Regulation Ileocecal Valve Iliacus Iliofemoral ligament Iliohypogastric nerve Ilioinguinal nerve Iliopsoas Iliotibial band Ilium Immune blood type reactions Immune Response the Immune System Immune System Memory Impact of Exercise on Heart Health Incus Inferior alveolar nerve Inferior gluteal nerve Inferior Vena Cava Infraspinatus Infraspinatus tendon Inner Ear Anatomy and Hearing Process Insulin Production and Diabetes Integumentary System Internal oblique Interstitial Fluid and Tissue Nourishment Intervertebral disc Intervertebral Disc Anatomy Intestinal enteroendocrine cells Intestinal epithelial cells the Intestines Iris Iron (in the body)Ischiofemoral ligament Ischium Islets of Langerhans Jaw Removal in Ameloblastoma Cases Jejunal Epithelium Joint capsule Joint space Juxtaglomerular Apparatus Kell blood group system Keratinocytes Kidd blood group system Kidney Nephron Structure the Kidneys Labial glands Lachrymal Apparatus Lachrymal Gland Lachrymal Glands and Tear Production Lachrymatory Factor Role Lacrimal Lactiferous ducts Landsteiner blood typing discovery Langerhans Cell Langerhans Cells in Skin Largest Human Organ Laryngeal tissue the Larynx Lateral collateral ligament Lateral femoral cutaneous nerve Lateral meniscus Lateral plantar nerve Lateral Semicircular Canal Latissimus dorsi Left ventricle Lens tissue Lesser occipital nerve Lesser petrosal nerve Lewis blood group system Ligament fiber Limbic System and Emotions Lingual glands Lingual nerve the Liver Long thoracic nerve Loop of Henle Lumbar facet joint Lumbar Vertebrae Lunate Lung Capacity and Performance the Lungs Lutheran blood group system Lymph node Lymph Node Function Lymphatic Capillary Lymphatic Drainage the Lymphatic System Lymphatic System and Immune Response Lymphocyte Lymphoid tissue Macrophage Macrophage Role Macrophages Macula Densa Macula lutea Magnesium Malleus Mammary glands Mandible Mandibular nerve Marie Curie's Radium Poisoning Martin Couney's Incubator Babies Masseter Maxilla Maxillary nerve Mechanism of Bone Remodeling Mechanism of Muscle Contraction Mechanisms of DNA Repair in Humans Mechanisms of Human Taste Perception Mechanisms of Taste and Smell Mechanoreceptors in the Skin Medial collateral ligament Medial meniscus Medial plantar nerve Median nerve Meibomian glands Meissner's Corpuscle Meissner's Corpuscles Meissner's Plexus Melanin Function Melanin Production Melanocyte Melanocyte Distribution Melanocytes Melatonin and Sleep Cycles Melatonin Circadian Rhythm Memory Meniscoid structure Meniscus Menstrual Cycle Hormonal Changes Menstrual Cycle Phases Mental nerve Merkel cells Metacarpals Metacarpophalangeal joint Metatarsals Metatarsophalangeal joint Microbiome Microscopic Anatomy Microscopic Structure of Bone Tissue Microvillus Mitochondria Mitochondrial DNA Inheritance Mitochondrion Mitral Valve Mitral Valve Prolapse Mixed acini MNS blood group system Monoclonal antibody blood typing Motor cortex Motor endplate Mucous acini Muscle Fiber Types and Functions Muscles the Muscular System Musculocutaneous nerve Myelin Myelin sheath Myenteric Plexus Myocardial Infarction Nail bed Nail matrix Nasal Natural blood type antibodies Navicular Neanderthal Genetic Inheritance Nephron the Nervous System Neural Crest Neurons Neuropeptide Y Role Neuroplasticity in Adults Neurotransmitter Neurotransmitter Acetylcholine Neurotransmitter Dopamine Pathways Neurotransmitter Function Neurotransmitter Receptor Types Neurotransmitter Reuptake Neurotransmitter Reuptake Process Neurotransmitter Serotonin Neurotransmitter Synapse Neurotransmitter Synthesis Neurotransmitter Types Neurotransmitters Neutrophil Extracellular Trap Neutrophils Newborn jaundice and blood type Nodes of Ranvier the Nose O negative blood type Occipital Occipital Lobe Ocular Anatomy and Vision Process Ocular Microbiome Oculomotor nerve Olfactory Bulb Sense of Smell Olfactory nerve Olfactory receptor cells Omega-3 Ophthalmic nerve Optic Chiasm Function Optic disc Optic nerve Orbicularis oculi Orbicularis oris Osseointegration Ossification Osteoblast Osteoblast Function Osteoblasts Osteoclasts Osteocytes Osteogenesis Imperfecta Otolith Oval window Oxytocin Oxytocin and Social Bonding P blood group system Pacemaker Cell Pacemaker Cells Activity Pacinian Corpuscle Pacinian Corpuscles Pain Palatal glands Palatine Palmaris longus the Pancreas Pancreatic acini Pancreatic alpha cells Pancreatic beta cells Pancreatic delta cells Pancreatic Insulin Secretion Pancreatic islet Pancreatic Islets Pancreatic Islets Hormonal Functions Paneth Cells Paranasal Sinuses Parathyroid chief cells Parathyroid Gland Parathyroid glands Parathyroid oxyphil cells Parietal Parietal cells Parotid glands Patella Patellar tendon Patellofemoral joint Pectoralis major Pectoralis minor Pelvis Pericardium Periodontal ligament Periosteum Peripheral Artery Peripheral Nervous System Peristalsis Peyer's patches Phagocytosis Process Phalanges Phantom Limb Pain Phantom Limb Syndrome Pharyngeal Arches Pharynx Pheromone Phineas Gage Incident Photoreceptor cells Phrenic nerve Pisiform the Pituitary Gland Pituitary Gland Functions the Placenta Placenta Function Placenta Functions Placental Structure Platysma Pleura Pleural Cavity Pleural Cavity Dynamics The Pons Function Pons Role in Brainstem Posterior cruciate ligament Posterior interosseous nerve Posterior talofibular ligament Pregnancy Primary Olfactory Cortex Role Principal Cell Prion Diseases Process of Human Lung Ventilation Pronator teres Prostate gland Protein Proximal interphalangeal joint Proximal radioulnar joint Proximal tubule Psoas major Pterion Region Puberty Pubis Pubofemoral ligament Pudendal nerve Pulmonary Valve Pulmonary Ventilation Purkinje Fibers Pyloric glands Pyloric Sphincter Quadriceps femoris Rachis Radial nerve Radius Rectal glands Rectus abdominis Rectus femoris Recurrent laryngeal nerve Red Blood Cells Red Bone Marrow REM Sleep Renal Corpuscle Renal Corpuscle Filtration Renal cortex Renal Filtering System Renal Glomerulus Renal medulla Renal pelvis Renal System Filtration Renal tissue Renal Tubular Function Renin-Angiotensin System Respiratory Membrane the Respiratory System Reticular Activating System Reticular Formation Retina Retina Photoreceptor Cells Retinal Pigment Epithelium Rh D antigen Rh factor genetics Rh negative blood factor Rh null blood type Rh positive blood factor Rhodopsin Protein Rhomboid major Ribs Right atrium Rod cells Rods of the Eye The Role of Dendrites Role of Gallbladder in Digestion Role of Insulin in Metabolism Role of Kidneys in Homeostasis Role of Kidneys in Waste Excretion Role of Liver in Detoxification The Role of Mitochondria Role of the Hippocampus in Memory Role of the Liver in Metabolism Role of the Pancreas in Digestion Rotator cuff Round window Saccule Sacroiliac joint Sacrum Sacrum Bone Saliva Salivary gland ducts Salivary Glands Saphenous nerve Saphenous Vein Sarcomere Sarcomere Function in Muscles Sarcopenia Definition Sarcoplasmic Reticulum Sartorius Scaphoid Scapula Schwann cells Sciatic nerve Scientific Studies on Sleep Paralysis Sclera Sebaceous gland Sebaceous gland cells Sebaceous glands Semicircular canal Semimembranosus Seminal vesicles Semitendinosus Sensory cortex Sensory Receptors in Skin Serotonin Serous acini Serratus anterior Sesamoid Bones Shoulder labrum Sickle Cell Anemia Sinoatrial node Sinus Node Skeletal muscle Skeletal Muscle Fiber Types the Skeletal System Skene's glands Skin Skin Microbiome Sleep Smooth muscle Smooth muscle cells Smooth Muscle Tissue Snellen Eye Chart Soleus Somatosensory System Spermatogenesis Sphenoid Sphenoid Bone Sphincter Muscles the Spinal Cord Spinal Cord Reflexes Spinal Reflex Arc Mechanism the Spleen Spleen Functions in Immunity Splenic tissue Stages of Human Fetal Development Stapes Stellate Ganglion Anatomy Stem Cell Differentiation Sternoclavicular joint Sternocleidomastoid Sternum the Stomach Stress Response Mechanisms Structure and Function of the Skin Structure of DNA Structure of Red Blood Cells Structure of the Human Skeleton Sublingual glands Submandibular glands Subscapularis Subscapularis tendon Subtalar joint Superfetation Phenomenon Superficial Fascial Layer Superficial peroneal nerve Superior alveolar nerve Superior gluteal nerve Supinator Supraclavicular nerve Suprascapular nerve Supraspinatus Supraspinatus tendon Sural nerve Sweat Sweat gland ducts Sympathetic Nervous System Synapse Synapse Communication Synaptic Transmission in Neurons Synovial fluid Synovial Fluid Analysis Synovial membrane T-Cell Activation Pathways T-Cell Maturation T-Tubules T-Tubules in Muscle Cells Talocrural joint Talus Tarsals Tarsometatarsal joint Taste bud Taste Bud Receptors Taste receptor cells Tears Teeth Telomere Length and Aging Telomeres Telomeres and Aging Temporal Temporalis Temporomandibular joint Tendon fiber Tendon Structures Tensor fasciae latae Teres major Teres minor Teres minor tendon Thalamic Nuclei Thalamus Role in Sensory Relay Thermoregulation in Humans Thermoregulation in Hypothalamus Thermoregulatory Processes Thoracic Vertebrae Thoracodorsal nerve Thrombocyte Thymic tissue Thymus Thymus gland the Thyroid Thyroid C cells Thyroid follicle Thyroid follicular cells Thyroid Function Thyroid gland Thyroid Hormone Synthesis Thyroid Hormones Tibia Tibial nerve Tibialis anterior Tibialis posterior Tibiofemoral joint Toll-like Receptors the Tongue Trabecular bone Trachea Trachea Structure and Function Tracheal tissue Transfusion compatibility charts Transverse abdominis Transverse cervical nerve Transverse humeral ligament Transverse Tubules Trapezium Trapezius Trapezoid Triceps brachii Tricuspid valve Trigeminal nerve Triquetrum Trochlear nerve Twins Two-Point Discrimination Tympanic membrane Type A antigen Type A blood and cancer risk Type A negative blood Type A positive blood Type AB antigen Type AB blood characteristics Type B antigen Type B blood characteristics Type B negative blood Type B positive blood Type O blood characteristics Type O positive blood Types of Human Brain Waves Types of Leukocytes and Their Functions Types of Muscle Fibers Ulna Ulnar nerve Urethral glands Uvula Uvula Function in Speech and Swallowing Vagus nerve The Vagus Nerve Function Vagus Nerve Functionality Vagus Nerve Stimulation Varicose Vein Vastus lateralis Vastus medialis Vertebrae Vestibular hair cells Vestibular System Vestibule Vestibulocochlear nerve Villages with Laron Syndrome Villous Trophoblast Vitamin Absorption Vitamin B12 Vitamin C Vitamin D Vitreous humor Vocal Cord Function Vocal Cords Voluntary Human Extinction Movement Vomer Vomeronasal Organ Von Ebner Gland Von Willebrand Factor White Blood Cell Types White Blood Cells White Blood Cells and Disease Prevention White matter Wright antigen blood group Wrist radiocarpal joint X-Linked Human Anomalies Zinc (in the body)Zona fasciculata Zona glomerulosa Zona reticularis Zonular Fibers Zygomatic Zygomatic Bone Zygomatic Bone Facial Structure Zygomaticus major