Question

Which of the following is not a derivative of skin?

• A. Thyroid gland
• B. Sebaceous glands
• C. Mammary glands
• D. Sweat Glands

Answer 1

The correct option is A

Thyroid gland

The correct option is A.

The explanation for the correct option:

1. The thyroid gland is an endocrine gland.
2. It performs an essential role in the growth, metabolism, and development of the human body.
3. All the endocrine glands are endodermal, ectodermal, or mesodermal in origin.
4. The endocrine glands, like thyroid glands, are not a derivative of skin.
5. Skin is the largest organ of the human body.

The explanation for the incorrect options:

Option B:

1. Sebaceous glands are one of the derivatives of skin.
2. These are the holocrine glands, which generate sebum, that is, a group of complex oils comprising fatty acids and triglycerides.
3. It lubricates the skin to protect against friction.

Option C:

1. Mammary glands are modified sweat glands.
2. They are a derivative of skin and are situated in the breasts of females, which are accountable for the production of milk or lactation.

Option D:

1. Sweat glands are the derivatives of skin.
2. It is found all over the body, however, the majority of them are found in the armpits, on the forehead, and on the soles and palms of the hand.
3. The prime function of sweat glands is to monitor the temperature of the body.

Final answer: The thyroid gland is not a derivative of skin.