Human Body – Quick GK Notes
Master the Human Body for Your Government Job Exam 🧠💪
A solid understanding of the human body is a must-have for success. This topic frequently appears in general knowledge sections, and having a strong grasp of its key concepts can give you a significant edge.
This post is your ultimate guide to mastering the most important facts about the human body. We've compiled a comprehensive list of essential information designed to boost your knowledge and get you exam-ready. Dive in and make this critical subject your strong suit!
Bones
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Total bones in adult human body → 206
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Largest bone → Femur (thigh bone)
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Smallest bone → Stapes (in the ear)
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Bone in thigh = Strongest bone
Muscles
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Largest muscle → Gluteus maximus (buttock)
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Smallest muscle → Stapedius (ear)
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Strongest muscle (by work) → Masseter (jaw muscle)
Cells
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Largest cell → Ovum (female egg cell)
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Smallest cell → Sperm cell
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Largest human organ cell (by volume) → Nerve cell
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Fastest dividing cells → Skin cells
Teeth
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Total → 32 teeth in adults
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Types:
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Incisors – cutting
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Canines – tearing
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Premolars – grinding
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Molars – grinding/crushing
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Blood
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RBC → Red Blood Cells (carry oxygen; lifespan ~120 days; contain hemoglobin)
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WBC → White Blood Cells (fight infections)
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Platelets → Help in clotting blood (lifespan ~5–9 days)
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Scientific name for WBC → Leukocytes
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Scientific name for RBC → Erythrocytes
Organs
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Largest external organ → Skin
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Largest internal organ → Liver
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Smallest organ → Pineal gland (in brain)
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Heaviest organ → Liver
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Lightest organ → Lungs
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Strongest internal organ → Heart (pumps ~7200 liters/day)
Other GK
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Normal body temperature → 37°C or 98.6°F
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Average blood volume → 5–6 liters (adult male), 4–5 liters (adult female)
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pH of blood → 7.35–7.45
