| ABC | absolute basophil count; absolute bone conduction; acalculous biliary colic; acid balance control; a... |
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| ABCD | airway, breathing, circulation, differential diagnosis (or defibrillate) [in cardiopulmonary resusci... |
| ABCDE | airway, breathing, circulation, disability, exposure [in trauma patients]; botulism toxin pentavalen... |
| ABCIC | airway, breathing, circulation, intravenous crystalloid |
| ADCC | acute disorder of cerebral circulation; antibody-dependent cell-mediated cytotoxicity |
| primitive pit | The depression in the primitive node that serves to connect the notochordal canal with the surface ectoderm and the yolk sac. These connections are referred to as the neurenteric canal. (05 Mar 2000) |
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| primitive reticular cell | A cell with processes making contact with those of other similar cell's to form a cellular network; along with the network of reticular fibres, the reticular cell's form the stroma of bone marrow and lymphatic tissues. (05 Mar 2000) |
| primitive ridge | One of the paired ridge's on either side of the primitive groove. (05 Mar 2000) |
| primitive streak | An ectodermal ridge in the midline at the caudal end of the embryonic disk from which arises the intraembryonic mesoderm; achieved by inward and then lateral migration of cells; in human embryos, it appears on day 15 and gives a cephalocaudal axis to the developing embryo. Synonym: germinal streak. (05 Mar 2000) |
| neuroectodermal tumour, primitive | A malignant brain tumour sharing common features and biologic properties with medulloblastoma. Some pathologists and clinicians use the terms interchangeably: they both can disseminate throughout the nervous system and, in some cases, systemically. most lesions arise from the posterior fossa in children under five years of age. The tumour often produces hydrocephalus and symptoms of increased intracranial pressure. Papilledema is often present. (12 Dec 1998) |
| assisted circulation | Pumping that aids the natural activity of the heart. (12 Dec 1998) |
| blood circulation | The course of the blood from the heart through the arteries, capillaries, and veins back again to the heart. (05 Mar 2000) |
| blood circulation time | Determination of the shortest time interval between the injection of a substance in the vein and its arrival at some distant site in sufficient concentration to produce a recognizable end result. It represents approximately the inverse of the average velocity of blood flow between two points. (12 Dec 1998) |
| capillary circulation | The course of the blood through the capillaries. (05 Mar 2000) |
| renal circulation | The circulation of the blood through the vessels of the kidney. (12 Dec 1998) |
| respiratory circulation | The mechanisms of pulmonary circulation coordinated with the heart and systemic circulation. It involves the flow or interruption of the flow of blood to the lungs as it affects respiration. Pulmonary circulation, a circulatory concept, emphasizes the passage of blood from the right to the left heart through the lungs. Respiratory circulation coordinates this with heart action, systemic circulation, and breathing. (12 Dec 1998) |
| cerebrovascular circulation | The circulation of blood through the vessels of the brain. (12 Dec 1998) |
| greater circulation | The circulation of blood through the arteries, capillaries, and veins of the general system, from the left ventricle to the right atrium. Synonym: greater circulation. (05 Mar 2000) |
| persistent foetal circulation syndrome | <syndrome> A syndrome of persistent pulmonary hypertension in the newborn infant, without demonstrable cardiac disease. It is characterised by cyanosis and acidosis, severe pulmonary vasoconstriction, hypertrophy of pulmonary arterial muscle, and elevated pulmonary vascular resistance, with resultant right-to-left shunting of blood through a patent ductus arteriosus and at times a patent foramen ovale. (12 Dec 1998) |
| circulation | <physiology> Movement in a regular or circuitous course, as the movement of the blood through the heart and blood vessels. Origin: L. Circulatio (18 Nov 1997) |