medulla spinalis

medulla

 [mĕ-dul´ah] (L.)

1. the inmost part of a structure or organ.

2. medulla oblongata.

3. marrow. adj., adj med´ullary.

adrenal medulla the inner portion of the adrenal gland, where epinephrine and norepinephrine are produced.

medulla of bone bone marrow.

medulla oblonga´ta that part of the hindbrain continuous with the pons above and the spinal cord below; it houses nerve centers for both motor and sensory nerves, where such functions as breathing and the beating of the heart are controlled. See also brain.

medulla os´sium bone marrow.

renal medulla the inner part of the substance of the kidney, composed chiefly of collecting tubules, and organized into a group of structures called the renal pyramids.

medulla spina´lis (medulla spina´lis) spinal cord.

medulla of thymus the central portion of each lobule of the thymus; it contains many more reticular cells and far fewer lymphocytes than does the surrounding cortex.

spi·nal cord

[TA]

the elongated cylindric portion of the cerebrospinal axis, or central nervous system, which is contained in the spinal or vertebral canal.

Synonym(s): medulla spinalis [TA], chorda spinalis, spinal marrow

spi·nal cord

(spī'năl kōrd) [TA]

The elongated cylindric portion of the cerebrospinal axis, or central nervous system, which is contained in the spinal or vertebral canal.
Synonym(s): medulla spinalis.

medulla

(me-dul'a, dul') plural.medullae [L. medulla, marrow, pith]

1. Marrow (1).

2. In anatomy, the innermost or central portion of an organ in contrast to the cortex.

3. The caudal segment of the hindbrain. Synonym: medulla oblongata; bulb (2)

4. The medulla ossium. medullary (med'ul-er?e, mej?), adjective

ADRENAL MEDULLA

adrenal medulla

The central tissue of the adrenal gland. It is filled with pheochromocytes, which are derived from the neural crest and resemble postsynaptic sympathetic ganglion cells. In response to stimulation by presynaptic sympathetic axons, the pheochromocytes secrete epinephrine and norepinephrine into the bloodstream. See: illustration

See: adrenal gland

medulla of hair

The central axis of a hair.

medulla of kidneys

See: pyramid, renal

medulla nephrica

See: pyramid, renal

medulla oblongata

Medulla (3).

medulla ossium

Marrow (1).

medulla of ovary

The central portion of the ovary, composed of loose connective tissue, blood vessels, lymphatics, and nerves.

medulla spinalis

The spinal cord.

spi·nal cord

(spī'năl kōrd) [TA]

The elongated cylindric portion of the cerebrospinal axis, or central nervous system, which is contained in the spinal or vertebral canal.
Synonym(s): medulla spinalis.