Category: C

The exchange of corresponding segments between chromatids of homologous chromosomes during meiosia, forming a chiasma. The reciprocal exchange of material between chromosomes that occurs during meiosis. The event is responsible for genetic recombination. The process involves the natural breaking of chromosomes, the exchange of chromosome pieces, and the reuniting of DNA molecules. In genetics, an…

Health care provided to a critically ill patient during a medical emergency or crisis. Assessing and treating the health of a person at immediate risk of dying. Critical care, also known as intensive care, covers the whole process of treating seriously ill patients. A term applied to exceptionally intensive care, usually delivered in the intensive…

Traumatic injuries involving the cranium and intracranial structures (i.e., brain; cranial nerves; meninges; and other structures). Injuries may be classified by whether or not the skull is penetrated (i.e., penetrating vs. nonpenetrating) or whether there is an associated hemorrhage.  

Pertaining to the cranium, or to the anterior (in animals) or superior (in humans) end of the body. Referring to the head, brain, or portion of the skull bones that encloses the brain.  

Presence of a thrombus in a coronary artery, often causing a myocardial infarction. An obstruction, generally a blood clot, within a coronary artery which hinders the flow of blood to a part of the heart. The formation of a blood clot on the rough inner surfaces of the atherosclerotic plaque. A blood clot which blocks…

Thickening and loss of elasticity of the coronary arteries.  

Encircling in the manner of a crown; a term applied to vessels; nerves, ligaments, etc. The term usually denotes the arteries that supply the heart muscle and, by extension, a pathologic involvement of them. Surrounding, as a crown, especially the coronary arteries surrounding the heart. “Crown-like” or “relating to a crown,” or “encircling.” In health…

Partial or total replacement of the cornea from one human or animal to another.  

The transparent part of the eye that covers the iris and the pupil and allows light to enter the inside. The transparent anterior portion of the fibrous coat of the eye, and serving as the first refractive medium of the eye. Outer, transparent portion of the eye, consisting of five layers through which light passes…

The muscular organ that maintains the circulation of the blood. c. adiposum a heart that has undergone fatty degeneration or that has an accumulation of fat around it; called also fat or fatty, heart. c. arteriosum the left side of the heart, so called because it contains oxygenated (arterial) blood. c. biloculare a congenital anomaly…