Give the biological /technical terms for the following:

A thin membrane covering the entire front part of the eye.

Q. Give appropriate biological/technical terms for the following.
The membrane that encloses the lungs.

Q. Give appropriate biological/technical terms for the following.
The outermost covering of a vacuole.

Q. Given the biological/technical terms for the following.
$\left(i\right)$ A mixture of smoke and fog.
$\left(ii\right)$ Capacity of our body to resist diseases.
$\left(iii\right)$ Fixing of developing zygote on the uterine wall.
$\left(iv\right)$ The permanent stoppage of menstruation at about the age of $45$ years in a female.
$\left(v\right)$ The hormone increasing reabsorption of water by kidney tubules.
$\left(vi\right)$ A thin membrane covering the entire front part of the eye.
$\left(vii\right)$ The lens of eye losing flexibility resulting in a kind of long-sightedness in middle-aged people.
$\left(viii\right)$ The number of persons living per square kilometre at any given time.
$\left(ix\right)$ The sound produced when the atrioventricular valves close in the heart.
$\left(x\right)$ The process by which blood cells engulf bacteria.