Skin: The Jack of all Trades
ICSE · Class 9 · Biology
Most important questions from Skin: The Jack of all Trades for ICSE Class 9 Biology board exam 2026. MCQs, short answer, and long answer questions with marks.
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Which of the following are primary functions of human skin?
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Protection from mechanical shocks, Temperature regulation, Sensation of touch and pain, Synthesis of Vitamin D
Skin performs multiple functions including protection, sensation, temperature regulation, and vitamin D synthesis. Digestion is not a function of skin but of the digestive system.
Which of the following are derivatives of human skin?
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Hair, Nails, Sweat glands, Mammary glands
Hair, nails, sweat glands, sebaceous glands, and mammary glands are all derivatives of skin. Teeth are not skin derivatives.
The oily secretion produced by sebaceous glands is called:
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Sebum
Sebaceous glands produce sebum, an oily secretion that makes hair and skin waterproof and keeps the epidermis supple.
Normal human body temperature is approximately:
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37°C
Normal human body temperature is about 37°C when measured in the mouth. It may be 1°C higher in rectum and 1°C lower in armpits.
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