How the Body Works
Educational information about human anatomy, body systems, and how the body functions.
Articles
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Blood Types: ABO System, Rh Factor & Compatibility
Complete guide to blood types and blood groups. Learn about ABO system, Rh factor, transfusion compatibility, and blood type inheritance. Evidence-based...
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Body Temperature: Normal Range, Regulation & Fever Guide
Learn about normal body temperature ranges (36-37.8°C), how your body regulates temperature through the hypothalamus, and when fever indicates illness....
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Bones and Joints: How the Skeletal System Works
Complete guide to bones, joints and the skeletal system. Learn how 206 bones protect organs, enable movement, and produce blood cells. Evidence-based...
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Cells and Tissues: How Your Body Is Built
How cells and tissues work in the human body. Learn about cell structure, cell division, chromosomes, DNA, stem cells and the four tissue types....
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Digestive System: How Your Body Breaks Down Food
How the digestive system works - learn about the gastrointestinal tract, stomach, intestines, liver, and pancreas. Evidence-based guide to digestion from...
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Endocrine System: How Hormones Control Your Body
Complete guide to the endocrine system and hormones. Learn how glands like the pituitary, thyroid, and adrenals regulate metabolism, growth, mood, and...
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Female Reproductive System: Anatomy & Function Guide
Complete guide to female reproductive anatomy - uterus, ovaries, vagina, vulva. Learn how the menstrual cycle works, hormones, and reproductive health....
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Heart & Circulatory System: How Blood Flow Works
How the heart and circulatory system work - complete guide to cardiac anatomy, blood vessels, heart chambers, valves and blood circulation. Evidence-based...
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How Blood Works: Components, Functions & Circulation
Learn how blood works in your body. Discover blood components (red cells, white cells, platelets, plasma), blood functions, clotting mechanisms, and...
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How the Brain Works: Structure, Functions & Anatomy
How the brain works - complete guide to brain anatomy, structure and functions. Learn about the cerebrum, cerebellum, brain stem, neurons and brain...
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How the Ear Works: Hearing and Balance System Explained
Learn how the ear, hearing, and balance system work. Discover the anatomy of outer, middle, and inner ear, how sound becomes hearing, and how your...
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How the Eye Works: Vision, Anatomy & Light Processing
How does the human eye work? Learn about eye anatomy, how we see light and color, the retina, cornea, lens, and how the brain processes visual information....
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How Your Kidneys Work: Complete Guide to Urinary System Function
Learn how your kidneys filter blood, produce urine, and maintain vital body functions. Expert guide to kidney anatomy, nephron function, and urinary tract...
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Human Body Systems: How Your Body Works
Complete guide to human body systems - learn how your organs, tissues, and cells work together. Understand the skeletal, muscular, nervous, cardiovascular,...
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Immune System: How Your Body Fights Infection
How does the immune system work? Learn about white blood cells, antibodies, T-cells, B-cells, and how your body defends against bacteria and viruses....
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Lymphatic System: How It Works & Why It Matters
Learn how the lymphatic system works: lymph nodes, lymph fluid, immune defense, and fluid balance. Complete guide to lymphatic anatomy, function, and common...
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Male Reproductive System: Anatomy, Function & Health
Complete guide to male reproductive anatomy - penis, testicles, prostate and how sperm production works. Learn about erection, ejaculation, fertility and...
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Menstrual Cycle: How Menstruation Works & What to Expect
Learn how the menstrual cycle works, from ovulation to menstruation. Understand period symptoms, cycle length, and when to see a doctor. Evidence-based...
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Muscles and Tendons: Complete Anatomy Guide
How do muscles and tendons work? Learn about skeletal muscles, cardiac muscles, smooth muscles, tendon anatomy, and muscle function. Evidence-based guide...
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Nervous System: How Your Brain and Spinal Cord Work
Complete guide to the nervous system - brain, spinal cord, and nerves. Learn how neurons transmit signals, control movement, and process sensations....
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Ovulation: How It Works, Signs & Fertility Window
Learn how ovulation works, when it occurs in your cycle, and how to recognize ovulation signs. Understand the fertility window, LH surge, and conception...
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Reproductive System: How Male and Female Sex Organs Work
How the reproductive system works - complete guide to male and female anatomy, sexual function, and fertility. Learn about ovaries, testes, hormones, and...
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Respiratory System: How Lungs and Airways Work
How do lungs and airways work? Complete guide to the respiratory system, gas exchange, breathing mechanics, and lung function. Evidence-based medical...
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Sense of Touch: How Touch Receptors & Sensory Nerves Work
How does the sense of touch work? Learn about touch receptors, pain sensors, temperature detection, and how your brain processes tactile sensations....
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Skin, Hair & Nails: Anatomy, Function & Structure
How skin, hair and nails work - complete guide to the integumentary system. Learn about skin layers, hair follicles, nail structure, and how they protect...
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Taste and Smell: How Your Senses Work Together
How do taste and smell work? Learn about taste buds, olfactory receptors, and why food loses flavor when you have a cold. Evidence-based guide from medical...