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This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal.
The anterior pituitary (also called the adenohypophysis or pars anterior) is a major organ of the endocrine system.The anterior pituitary is the glandular, anterior lobe that together with the posterior pituitary (or neurohypophysis) makes up the pituitary gland (hypophysis) which, in humans, is located at the base of the brain, protruding off the bottom of the hypothalamus.
Anterior and posterior, which describe structures at the front (anterior) and back (posterior) of the body. For example, the toes are anterior to the heel, and the popliteus is posterior to the patella. [1] Superior and inferior, which describe a position above (superior) or below (inferior) another part of the body. For example, the orbits are ...
Parallel are the anterior axillary line, which passes through the anterior axillary skinfold, and the posterior axillary line, which passes through the posterior axillary skinfold. The mid-clavicular line , a line running vertically down the surface of the body passing through the midpoint of the clavicle .
The mammalian nervous system is arranged with the neural tube running along an anterior to posterior axis, from nose to tail for a four-legged animal like a dog. Humans, as two-legged animals, have a bend in the neuraxis between the brain stem and the diencephalon , along with a bend in the neck, so that the eyes and the face are oriented forward.
Cephalization is a characteristic feature of any animal that habitually moves in one direction, thereby gaining a front end. In practice, this primarily means the bilaterians, a large group containing the majority of animal phyla. [3]
For females, the mons pubis forms the anterior and superior portion of the vulva.It divides into the labia majora (literally "larger lips"), on either side of the furrow known as the pudendal cleft that surrounds the rest of the vulvar parts: labia minora, clitoris, urinary meatus, vaginal opening, and vulval vestibule.
A commissure (/ ˈ k ɒ m ə ʃ ər /) is the location at which two objects abut or are joined. The term is used especially in the fields of anatomy and biology. The most common usage of the term refers to the brain's commissures, of which there are at least nine. Such a commissure is a bundle of commissural fibers as a tract that crosses the midline at i