| Longest bone in human body | Femur (thigh bone) |
| Smallest bone | Stapes in the middle ear |
| Hardest material in the human body | Tooth enamel |
| Strongest muscle | Jaw muscle |
| Largest external organ | Skin |
| Largest internal organ | Liver |
| Smallest gland | Pituitary |
| Largest artery | Aorta |
| Smallest blood vessel | Capillary |
| Mineral most common in human body | Calcium |
| Compound most abundant in human body | Water |
| Pigment which gives a colour to the skin | Melanin |
| Nails are modification of | Epidermis (external layer of skin) |
| Connective tissues that attach muscles to bones | Tendons |
| Connective tissues that attach Bones to bones | Ligaments |
| Sebaceous glands secrete | Sebum or oil |
| Lachrymal glands secrete | Tears |