medulla
me·dul·la / məˈdələ/ • n. Anat. the inner region of an organ or tissue, esp. when it is distinguishable from the outer region or cortex (as in a kidney, an adrenal gland, or hair). ∎ short for medulla oblongata. ∎ Bot. the soft internal tissue or pith of a plant.DERIVATIVES: med·ul·lar·y / məˈdələrē; ˈmejələrē/ adj.
medulla oblongata
medulla oblongata Part of the vertebrate brainstem, derived from the hindbrain, that is continuous with the spinal cord. Its function is to regulate the reflex responses controlling respiration, heart beat, blood pressure, and other involuntary processes. It gives rise to many of the cranial nerves.
medulla
medulla
medulla (mi-dul-ă) n.
1. the inner region of any organ or tissue, particularly the inner part of the kidney, adrenal glands, or lymph nodes. m. oblongata (myelencephalon) the extension within the skull of the upper end of the spinal cord, containing centres responsible for the regulation of the heart and blood vessels, respiration, salivation, and swallowing.
2. the myelin layer of certain nerve fibres.
—medullary adj.
1. the inner region of any organ or tissue, particularly the inner part of the kidney, adrenal glands, or lymph nodes. m. oblongata (myelencephalon) the extension within the skull of the upper end of the spinal cord, containing centres responsible for the regulation of the heart and blood vessels, respiration, salivation, and swallowing.
2. the myelin layer of certain nerve fibres.
—medullary adj.
medulla oblongata
me·dul·la ob·long·a·ta / äˌblôngˈgätə/ • n. the continuation of the spinal cord within the skull, forming the lowest part of the brainstem and containing control centers for the heart and lungs.
medulla
medulla
1. (in zoology) The central tissue of various organs, including the adrenal glands (adrenal medulla) and kidneys (renal medulla).
2. (in botany) See pith.
1. (in zoology) The central tissue of various organs, including the adrenal glands (adrenal medulla) and kidneys (renal medulla).
2. (in botany) See pith.
medulla
medulla
1. The central part of an organ or bone (i.e. the marrow).
2. Abbreviation for medulla oblongata. See MYELENCEPHALON.
1. The central part of an organ or bone (i.e. the marrow).
2. Abbreviation for medulla oblongata. See MYELENCEPHALON.
medulla
medulla marrow, pith. XVII. — L. medulla, perh. f. medius MID.
Hence medullary XVII.
Hence medullary XVII.
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