yellow body

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Related to yellow body: corpus luteum

cor·pus lu·te·um

, corpus luteum spuriumcorpus luteum verum
the yellow endocrine body, at least 1-1.5 cm in diameter, formed in the ovary at the site of a ruptured ovarian follicle immediately after ovulation; there is an early stage of proliferation and vascularization before full maturity; later, there is a festooned, bright-yellowish lutein zone traversed by trabeculae of theca interna containing numerous blood vessels; the corpus luteum secretes estrogen, as the follicle did, and also secretes progesterone. If pregnancy does not occur, the body is called a corpus luteum spurium (corpus luteum of menstruation), which undergoes progressive retrogression to a corpus albicans. If pregnancy does occur, the body is called a corpus luteum verum (corpus luteum of pregnancy), which increases in size, persisting to the fifth or sixth month of pregnancy before retrogression.
Synonym(s): yellow body
Farlex Partner Medical Dictionary © Farlex 2012

yellow body

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


1. A complete organism, living or dead; the sum of its physical components. Synonym: soma (1)
2. Trunk (1).
3. The principal mass of any structure.
4. . A distinct mass.
5. The largest or most important part of any organ. See: limbic system for illus

acetone body

Ketone body.

amygdaloid body

Amygdala (2).

anococcygeal body

The muscle and fibrous tissue lying between the coccyx and the anus.

aortic body

A chemoreceptor in the wall of the aortic arch that detects changes in blood gases, esp. oxygen, and pH. It is innervated by the vagus nerve and stimulates reflex changes in heart rate, respiration, and blood pressure that restore normal blood oxygen levels.

asbestos body

A beaded, dumbbell-shaped body formed when a macrophage engulfs asbestos fibers.

Barr body

See: Barr body

basal body

A small granule usually present at the base of a flagellum or cilium in protozoa. Synonym: basal granule; blepharoplast

chromaffin body

One of a number of bodies composed principally of chromaffin cells, arranged serially along both sides of the dorsal aorta and in the kidney, liver, and gonads. They are ectodermal in origin, having the same origin as cells of the sympathetic ganglia.
Synonym: paraganglion

ciliary body

A structure directly behind the iris of the eye. It secretes the aqueous humor and contains the ciliary muscle that changes the shape, and thus the refractive power, of the lens by tightening and relaxing the tension on the lens zonule.
Synonym: ciliary apparatus See: eye for illus

coccygeal body

An arteriovenous anastomosis at the tip of the coccyx formed by the middle sacral artery. Synonym: glomus coccygeum

denticulate body

The corpus dentatum of the cerebellum.

Donovan body

See: Donovan body

foreign body

Anything present at a site where it would not normally be found. Slivers, cinders, dirt, or small objects may lodge in the skin, ears, eyes, or nose or may be taken internally. If not removed, they may cause unsightly marks or tattooing of the skin and inflammation and infection of the tissue involved.
See: foreign bodies in ear; foreign bodies in the esophagus; foreign body in nose; foreign bodies in the skin; foreign bodies in vagina

carotid body

The chemoreceptors at the bifurcation of each common carotid artery, which detect changes in blood gases (esp. oxygen) and pH. They stimulate reflex changes in heart rate, respiration, and blood pressure that restore normal blood oxygen levels. They are innervated by the glossopharyngeal nerves.

fruiting body

The reproductive cap of a fungus. It contains the fungal spores.

Highmore body

See: Highmore, Nathaniel

hyaline body

A homogeneous substance resulting from colloid degeneration; found in degenerated cells.
See: degeneration, hyaline

ketone body

One of a number of substances that increase in the blood as a result of faulty carbohydrate metabolism. Among them are ß-hydroxybutyric acid, acetoacetic acid, and acetone. They increase in persons with untreated or inadequately controlled diabetes mellitus and are the primary cause of acidosis. They may also occur in other metabolic disturbances. Synonym: acetone body

lateral geniculate body

One of two bodies forming elevations on the lateral portion of the posterior part of the thalamus. Each is the termination of afferent fibers from the retina, which it receives through the optic nerves and tracts.

Lewy body

Lewy body.

loose body

A fragment of bone or cartilage within the joint of a patient with severe degenerative or neuropathic arthritis.

Luys body

See: Luys body

Mallory body

See: Mallory body

malpighian body

A historically important but out-of-date term for splenic lymph nodules or renal cells.

mammillary body

A spherical complex of hypothalamic nuclei that bulges out of the base of the brain behind the pituitary gland on either side of the midline. The mammillary body is an integral component of the limbic circuitry, receiving signals from the hippocampus via the fornix and sending signals to the anterior thalamus via the mammillothalamic tract.
See: medial mammillary nucleus; limbic system for illus

medial geniculate body

One of two bodies lying in the posterior part of the dorsal thalamus. Each receives fibers from the acoustic tract of the pons and the inferior colliculus through the brachium.

medullary body

The deeper white matter of the cerebellum enclosed within the cortex.

Nissl body

See: Nissl, Franz

olivary body


pacchionian body

Arachnoid granulation.

para-aortic body

One of the small masses of chromaffin tissue along the abdominal aorta that secrete epinephrine.

perineal body

A mass of tissue that separates the anus from the vestibule and the lower part of the vagina.

pineal body

See: pineal gland

pituitary body

Obsolete term for the pituitary gland.

polar body

A small nonfunctional cell produced in oogenesis resulting from the divisions of the primary and secondary oocytes.

postbranchial body

Ultimobranchial body.

psammoma body

A laminated calcified body seen in certain types of tumors and sometimes associated with chronic inflammation.

restiform body

One of the inferior cerebellar peduncles of the brain, found along the lateral border of the fourth ventricle. These two bands of fibers, principally ascending, connect the medulla oblongata with the cerebellum.

Ross body

See: Ross body

Russell body

See: Russell body

striate body

The corpus striatum, composed of the cordate and lenticular nuclei of the brain.

striated body

Corpus striatum.

trachoma body

A mass of cells present as an inclusion body in the conjunctival epithelial cells of individuals with trachoma.

trapezoid body

A transverse sheet of secondary sensory axons that originate in the cochlear nuclei and that cross the midline just dorsal to the pons in the rostral hindbrain. About half of the cochlear axons remain ipsilateral and ascend toward the inferior colliculus via the lateral lemniscus. Those cochlear axons that cross the cross the midline in the trapezoid body also join the (contralateral) lateral lemniscus and run toward the inferior colliculus.

ultimobranchial body

One of two embryonic pharyngeal pouches usually considered as rudimentary fifth pouches. They become separated from the pharynx and incorporated into the thyroid gland, where they give rise to parafollicular cells that secrete calcitonin, a hormone that lowers the blood calcium level.

vertebral body

A short column of bone forming the weight-supporting portion of a vertebra. From its dorsolateral surfaces project the roots of the arch of a vertebra.

vitreous body

Vitreous (2).

wolffian body


yellow body

Corpus luteum.
Medical Dictionary, © 2009 Farlex and Partners
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