an inner layer of an organ, such as the medulla of the kidneys
The un-pigmented cell layer immediately below the cortex
(meh dull´ luh) [L.: narrow] • (1) The inner, core region of an organ, as in the adrenal medulla (adrenal gland) or the renal medulla (kidneys). (2) The portion of the brain stem that connects to the spinal cord.
Core of large air-filled pockets between collapsed cells which occur in the centre of hair fibres. Fibres containing a medulla are called medullated and have a different appearance to unmedullated fibres. In kemp, the medulla forms the greatest portion of the fibre and is surrounded by a comparatively thin layer of cortex.
The middle portion of an organ.
(meh-DUL-ah) An inner, or deeper, part of an organ. For example, the medulla of the kidneys and the medulla of the adrenal gland.
The loose layer of hyphae below the upper cortex and algal layer.
The innermost part of an organ (kidney, adrenal gland, brain) or hair shaft; contrasted with cortex.
The inner part of an organ. The adrenal medulla is the centre of the adrenal gland where epinephrine (adrenaline) is produced.
The innermost area of an organ.
the inner portion of the adrenal glands; a swelling at the tip of the hindbrain that serves as the passageway for nerves extending to and from the brain.
inner layer of the kidney (interior to the cortex) containing the loops of Henle
T he innermost layer of hair that reflects light giving hair the various color tones it has. Vellus hairs lack a medulla.
lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata); "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"
the inner part of an organ or structure in plant or animal
the inner layers of cells; colorless and may function in storage.
L. medius, middle. The middle or marrow of bone. Medulla oblongata.
Latin = marrow; applied to part of an organ deep to its cortex, and to the spinal cord and adjoining part of brain stem, which may have been thought to be the marrow of the vertebral column, adjective - medullary pertains to the medulla of an organ or medulla oblongata.
The innermost section of hair, composed of several layers of cells.
Also called the inner hair shaft, this layer of the shaft contain extremely small cells and is generally only seen in thick strands of hair. Some hair strands may contain medulla and some may not.
is the soft innermost core of the hair.
1. A term referring to the central portion of certain organs; e.g., the medulla oblongata of the brain and the adrenal medulla, which synthesizes epinephrine and norepinephrine. 2. In more common usage, the area in the brain that regulates breathing, heartbeat, blood pressure and similar activities.
The hollow core found in coarse guard hair or kemp fibers, often found in the chest and underbelly portions of the fleece.
inner substance of an organ, as of the kidney, adrenal gland, etc
medulla - middle, innermost part]. A term used to describe the innermost part of an organ (ie. the brain, ovary or kidney). For example, in the ovary the middle portion of connective tissue that does not contain follicles.
The central part of a gland, such as the adrenal medulla. More about this.
the inner layer of an organ
the inner core of a body structure, such as the adrenal gland
The central portion of some animal fibres consisting of a series of cavities formed by the medullary cells which collapse during the growth process. In kemp the medulla forms the greatest portion of the fibre and is surrounded by a comparatively thin layer of cortex. In fibres from the outer coat of some breeds of sheep and certain other animals (e.g., reindeer) the inedlillaalso forms a large portion of the fibre.
Also known as the medulla oblongata, this region of the brain is concerned with vital functions like breathing, blood circulation, vomiting, and swallowing.