The eyes is majorly divided into 3 parts: vitreous chamber, anterior and posterior chambers.
Vitreous chamber is the largest, a clear jellylike substance that fills the back part of the eye lies behind the lens and surrounded by blood vessels
Anterior chamber is in the front section of the eye, separating the cornea and iris and contains a aqueous humor (a clear watery fluid) flowing through to provide nourishment.
The aqueous passes through the posterior chamberlocated behind the iris and flows through the pupil located on the iris' back into the anterior chamber.
dorsal = back
ventral = stomach
anterior - front
posterior - back
For a worm...
worms back side = dorsal
underside = ventral
head area front = anterior
hind end = posterior
Posterior means behind & Anterior means toward the front. :)
the ventral cavity is anterior to the dorsal cavity which is in the posterior.
....behind/back and antonym would be anterior - in front/front
Posterior
There is an anterior chamber and a posterior chamber to the eye. The anterior chamber is from the lens and iris forward to the back of the cornea. The posterior chamber is from the back of the lens to the retina. The anterior chamber is filled with aqueous. The posterior chamber is filled with vitreous.
anterior
Anterior. Meaning towards the front.
posterior
The kidneys have their anterior and posterior surfaces. The foremost surface countenances towards the front stomach wall, while the back posterior surfaces confronting the posterior stomach wall. These surfaces are isolated by the edges of the kidney, which are the significant convexity horizontally, and minor concavity medially.
Anterior, posterior and lateral also.
What animals? As anterior means front and posterior means back, then most-if not all animals have a front and back, or an anterior and posterior. They are usually characterized by a mouth(anterior) or rectum/anus (posterior).
the ventral cavity is anterior to the dorsal cavity which is in the posterior.
Anterior, the front. As opposed to posterior, behind
Anterior refers to what is in front for example your abdomen is anterior whereas your back is posterior relative to eachother. Another example is that your nose is anterior to your brain. Anterior and posterior are relative terms.
....behind/back and antonym would be anterior - in front/front
Before in time; antecedent., Before, or toward the front, in place; as, the anterior part of the mouth; -- opposed to posterior.
Posterior
Anterior