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The human body, vitamins and branches of biology — a high-yield quick reference for competitive exams.
| Aspect | Details |
|---|---|
| Largest organ | Skin |
| Largest gland | Liver |
| Smallest bone | Stapes (in the ear) |
| Longest bone | Femur (thigh bone) |
| Number of bones (adult) | 206 |
| Universal blood donor | O-negative |
| Universal blood recipient | AB-positive |
| Normal body temperature | 37°C (98.6°F) |
| Vitamin | Deficiency Disease |
|---|---|
| Vitamin A | Night blindness |
| Vitamin B1 | Beriberi |
| Vitamin C | Scurvy |
| Vitamin D | Rickets |
| Vitamin K | Poor blood clotting |
| Branch | Study of |
|---|---|
| Botany | Plants |
| Zoology | Animals |
| Genetics | Heredity & variation |
| Ecology | Organisms & their environment |
| Ornithology | Birds |