Circadian: Refers to events occurring within the span of a full 24-hour day, as in a circadian clock.
- Circinate balanitis
Circinate balanitis:A form of skin inflammation around the penis in males with Reiter’s syndrome. The skin around the shaft and tip (glans) penis can become inflamed and scale. This inflammation around the penis can be helped by cortisone creams (such as TOPICORT). Reiter’s syndrome is a systemic rheumatic disease, systemic since it can affect the […]
- Circle of Willis
Circle of Willis: A critical arterial circle at the base of the brain. The circle of Willis receives all the blood that is pumped up the two internal carotid arteries that come up the front of the neck. All the principal arteries that supply the two halves of the brain (hemispheres) branch off from the […]
- Circular breathing
Circular breathing: Inhaling through the nose and inflating the cheeks and neck with air at the same time. This technique is sometimes employed by singers or wind instrument players.
Circulation: In medicine, the movement of fluid through the body in a regular or circuitous course. The circulatory system, composed of the heart and blood vessels, functions to produce circulation. Heart failure is an example of a problem with circulation.
- Circulation, fetal
Circulation, fetal: The blood circulation in the fetus (an unborn baby). Before birth, blood from the fetal heart that is destined for the lungs is shunted away from the lungs through a short vessel called the ductus arteriosus and returned to the aorta. When this shunt is open, it is said to be a patent […]