Question

plzzz answer this genuinely
please​

Answer 1

Answer:

C option

Explanation:

kertin are also present in hair

ie. They have only one location

Also they need to keep our hair safe

to the damage also they have 1 function

Answer 2

Explanation:

Glenoid Cavity : The glenoid cavity or glenoid fossa of scapula is a part of the shoulder. It is a shallow, pyriform articular surface, which is located on the lateral angle of the scapula.... The rotator cuff also reinforces this joint more specifically with the supraspinatus tendon to hold the head of the humerus in the glenoid cavity

Keratin: A type of protein found on epithelial cells, which line the inside and outside surfaces of the body. Keratins help form the tissues of the hair, nails, and the outer layer of the skin. They are also found on cells in the lining of organs, glands, and other parts of the body.

Alveoli: Alveoli are tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going. ... You have about 480 million alveoli, located at the end of bronchial tubes. When you breathe in, the alveoli expand to take in oxygen. When you breathe out, the alveoli shrink to expel carbon dioxide.

Arrector Pili Muscle: This is a tiny muscle that attaches to the base of a hair follicle at one end and to dermal tissue on the other end. In order to generate heat when the body is cold, the arrector pili muscles contract all at once, causing the hair to "stand up straight" on the skin.