Final answer:
The human eye has two cavities: the anterior cavity, filled with aqueous humor, and the posterior cavity, filled with vitreous humor, both crucial for eye function.
Step-by-step explanation:
The human eye is divided into two main cavities: the anterior cavity and the posterior cavity. The anterior cavity lies between the cornea and the lens, including the iris and the ciliary body. This cavity is filled with a watery fluid known as the aqueous humor. In contrast, the posterior cavity extends from the back of the lens to the interior of the eyeball up to the retina. This cavity contains a more viscous fluid termed vitreous humor. Both of these fluids play critical roles in maintaining the shape of the eye, providing nutrients, and facilitating light transmission to the retina.