Examlex
If the relative mass of a hydrogen atom is 1/4 that of a helium atom,how many hydrogen atoms would you need to equal the mass of four helium atoms?
Vitreous Humor
A clear, gel-like substance that fills the space between the lens and the retina of the eye, helping maintain its shape.
Fovea Centralis
The fovea centralis is a small depression in the retina where visual acuity is highest, responsible for sharp central vision.
Choroid
A layer of the eye containing blood vessels and pigment that helps to nourish the retina and absorb light, preventing reflections within the eye.
Sclera
The white outer layer of the eyeball, providing protection and form.
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