Question

Which are the four layers of an eyelid (palpebra)?

Answer 1

The four layers of an eyelid (palpebra) are: the skin, subcutaneous tissue, orbicularis oculi muscle, and palpebral conjunctiva.

Step-by-step explanation:

The four layers of an eyelid (palpebra) are:

1. The skin, which is the outermost layer that covers the eyelid.
2. The subcutaneous tissue, which is a layer of fat that provides cushioning and insulation.
3. The orbicularis oculi muscle, which surrounds the eyelid and controls its movement.

4. The palpebral conjunctiva, which is a thin membrane attached to the inner surface of the eyelid that covers the anterior surface of the cornea.

The tarsal plate gives stiffness and shape to the eyelids. Finally, the conjunctiva is the mucous membrane that covers the back of the eyelid and connects to the eyeball. It's part of the tear film system and helps in lubrication.