Anterior
....behind/back and antonym would be anterior - in front/front
The anterior depression on the scapula is called the subscapular fossa. It is located on the anterior surface of the scapula and serves as the attachment site for the subscapularis muscle.
The key differences between the posterior and anterior regions of the human body are their locations. The posterior region is the back side of the body, while the anterior region is the front side. Additionally, the posterior region typically has larger muscles and more bony prominences compared to the anterior region.
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.
the ventral cavity is anterior to the dorsal cavity which is in the posterior.
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.
....behind/back and antonym would be anterior - in front/front
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).
Anterior
Not sure of the context, but: Anterior = front posterior = rear
If you refer to lungs in humans, then the lungs are anterior to the spine
the opposite of anterior is Posterior.
Which structure lies posterior to the bladder and anterior to the rectum?
Anterior has four surfaces while posterior has five.
the supraspinatus ...I think Deltoid muscle(acromial part)