| solar system | The group of celestial bodies, including the earth, orbiting around and gravitationally bound by the sun. It includes nine planets, 34 natural satellites, more than 1,000 observed comets, and thousands of lesser bodies known as minor planets (asteroids) and meteoroids. (12 Dec 1998) |
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| somesthetic system | Sensory data derived from skin, muscles, and body organs in contrast to that derived from the five special senses. (05 Mar 2000) |
| SOS system | The DNA repair system also called error prone repair in which apurinic DNA molecules are repaired by incorporation of a base that may be the wrong base but that permits replication. RecA protein is required for this type of repair. SOS genes function in control of the cell cycle in pro and eu karyotes. (18 Nov 1997) |
| static system | That part of the neuromuscular system whereby the animal organism is maintained in posture and equilibrium, and counteracts the forces of gravity and atmospheric pressure; distinguished from the kinetic system. (05 Mar 2000) |
| stomatognathic system | The mouth, teeth, jaws, pharynx, and related structures as they relate to mastication, deglutition, and speech. (12 Dec 1998) |
| stomatognathic system abnormalities | Congenital structural abnormalities of the mouth and jaws, including the dentition. (12 Dec 1998) |
| neuromuscular system | The muscles of the body collectively and the nerves supplying them. (05 Mar 2000) |
| neurotransmitter system | A group of nerve cells that use the sameneurotransmitter to communicate. (22 May 1997) |
| non-specific system | <physiology> A physiological term denoting that part of the brainstem reticular formation that plays a central role in the organism's bodily and behavorial alertness. It extends as a diffusely organised neural apparatus through the central region of the brainstem into the subthalamus and the intralaminar nuclei of the thalamus; by its ascending connections it affects the function of the cerebral cortex in the sense of behavioural responsiveness; its descending (reticulospinal) connections transmit its activating influence upon bodily posture and reflex mechanisms (e.g., muscle tonus), in part by way of the gamma motor neurons. See: reticular formation. Synonym: non-specific system. (05 Mar 2000) |
| noradrenergic system | The system of nerve cells that uses noradrenaline as its neurotransmitter. (13 Nov 1997) |
| delivery system | A manmade system with the purpose of delivering a drug or another chemical directly into a cellular target, such as a via a manmade vesicle called a liposome. (09 Oct 1997) |
| dermal system | Dermoid system, the skin and its appendages, the nails and hair. (05 Mar 2000) |
| system | <biology, ecology> A group of related natural objects or forces within a defined zone, a regularly interacting or interdependent group of items forming a unified whole, a more general and less rigorous term than ecosystem. (09 Oct 1997) |
| system of macrophages | A widely distributed collection of both free and fixed macrophages derived from bone marrow precursor cells by way of monocytes; their substantial phagocytic activity is mediated by immunoglobulin and the serum complement system. In both connective and lymphoid tissue, they may occur as free and fixed macrophages; in the sinusoids of the liver, as Kupffer cells; in the lung, as alveolar macrophages; and in the nervous system, as microglia. Synonym: system of macrophages. (05 Mar 2000) |
| diagnostic techniques, digestive system | Methods and procedures for the diagnosis of diseases or dysfunction of the digestive system or its organs or demonstration of their physiological processes. (12 Dec 1998) |