System, cardiovascular
The circulatory system which comprises the heart and blood vessels. The system carries nutrients and oxygen to the tissues of the body and removes carbon dioxide and other wastes from them.
The cardiovascular system is a closed tubular system in which the blood is propelled by the heart. The system has two circuits, the pulmonary circuit and the systemic circuit. Each circuit has arterial, capillary, and venous components.
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improper development of the thymus gland means that T cell production is diminished. Other immune disorders result from either an excessive immune response or an ‘autoimmune attack’. Asthma, familial Mediterranean fever and Crohn disease (inflammatory bowel disease) all result from an over-reaction of the immune system, while autoimmune polyglandular syndrome and some facets of diabetes […]
- System, locomotive
The system that permits locomotion, movement from one place to another. The key components of this system are the bones that are the framework of the skeleton, the joints that hold the bones together and make movement possible, and the muscles that contract and relax and make for movement. Locomotive is derived from the Latin […]
- System, parasympathetic nervous
A part of nervous system that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles. The parasympathetic nervous system together with the sympathetic nervous system (that accelerates the heart rate, constricts blood vessels, and raises blood pressure) constitute the autonomic nervous system.
- System, peripheral nervous (PNS)
That portion of the nervous system that is outside the brain and spinal cord. The peripheral nervous system (PNS) is one of the two major divisions of the nervous system. The other is the central nervous system (CNS) which is made up of the brain and spinal cord. The nerves in the peripheral nervous system […]
- System, sympathetic nervous
A part of nervous system that accelerates the heart rate, constricts blood vessels, and raises blood pressure. The sympathetic nervous system together with the parasympathetic nervous system (that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles) constitute the autonomic nervous system.