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Posterior simply means the back side or behind, which is the opposite of anterior, which is the front side.
posterior
The term "anterior" is the same as "frontal." It refers to the front part or surface of something.
It means front, antrior is front and posterior is rear, or back.
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Posterior (Back)Anterior (Front)term means pertaining to the back and to the front
posterior
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 medical term you are looking for is "posterior." This term refers to the back side of the body or something positioned behind a particular structure.
posterior
Posterior means towards the rear of the frog.
No, the heart is anterior to the spine. Posterior means "behind" therefore the spine is posterior to the heart.