Question

What are tears, and what are their functions?

Answer 1

Hint: Tears are a transparent liquid secreted by the lacrimal glands found within the eyes of all land mammals. Their functions include lubricating the eyes, removing irritants, and aiding the system. Tears also occur as a neighborhood of the body's natural pain response.

Complete answer:
Tears (lacrimal fluid) may be a watery solution containing salts, some mucus, and lysozyme It deans, lubricates, and moistens the eyeball.
Functions of Tears:
After blinking, a film of tear fluid coats the surface of the attention at a particular thickness, and is maintained for a short time. This is often called tear stability. Tears not only keep the attention moist but even have a crucial role in maintaining the healthy functioning of the attention.
1. Preventing dryness
Tears prevent dryness by coating the surface of the attention, also as protecting it from external irritants.
2. Supplying oxygen and nutrients to the eyes
There are not any blood vessels on the surface of the attention, so oxygen and nutrients are transported to the surface cells by tears.
3. Preventing infection
Foreign bodies that enter the attention are washed out by tears. Moreover, tears contain a substance called lysozyme, which has an antibacterial action, and works to stop invasion and infection by microbes.
4. Healing damage to the surface of the attention
Tears contain components that heal damage to the surface of the attention.
5. Creating a smooth surface on the attention
Tears lubricate and smooth the surfaces of our eyes in order that light is refracted correctly, enabling us to ascertain clearly.

Note:
The tears from watering eyes might only fill your eyes or they could trickle down your face. Eyes water for many different reasons besides crying. Another problem isn't having the ability to empty the tears, therefore the eyes can get too filled with liquid.