Exam study 1 Integumentary System 4

Question 1

Function of integumentary system

Answer 1

Integumentary system consists of skin, hair, nails, glands and nerves and its main function is to act as a barrier to protect the body from the outside world. It also functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature.

Question 2

The 3 Layers of the skin?

Answer 2

1. Epidermis; the outermost layer of the skin, which provides a waterproof barrier and creates our skin tone
2. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands
3. The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.

Question 3

4 Cells of the epidermis?

Answer 3

1. Keratinocytes: form epidermal keratin. They constitute 80% of the cellular population in the epidermis.
2. Melanocytes: these produce melanin, the pigment that provides the skin with its colour and protects it from the sun’s rays.
3. Langerhans cells: acting as gatekeepers, they provide immune defence, particularly in capturing allergens
4. Merkel cells: originating from nerve cells, they are highly sensitive receptors involved in the sense of touch.