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Bio 12
CIrculatory
| Term | Definition |
|---|---|
| Antibody | a blood protein produced in response to and counteracting a specific antigen. Antibodies combine chemically with substances that the body recognizes as alien, such as bacteria, viruses, and foreign substances in the blood. |
| Antigen | a toxin or other foreign substance that induces an immune response in the body, esp. the production of antibodies. |
| Arterial Duct | the connection between the pulmonary artery and the aorta, directs blood away from lungs into systemic circulation |
| AV valve | either of two heart valves through which blood flows from the atria to the ventricles; prevents return of blood to the atrium |
| Autonomic Nervous System | the part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes. |
| AV Node | s a part of the electrical control system of the heart that coordinates the top of the heart. It electrically connects atrial and ventricular chambers. |
| Blood Pressure | the pressure of the blood in the circulatory system, often measured for diagnosis since it is closely related to the force and rate of the heartbeat and the diameter and elasticity of the arterial walls. |
| Blood velocity | the velocity or speed of blood in the aorta. |
| Chordae Tendineae | The chordae tendineae, or heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart. |
| Diastolic Pressure | the blood pressure (as measured by a sphygmomanometer) after the contraction of the heart while the chambers of the heart refill with blood |
| Fetal Circulation | the system of blood vessels and structures through which blood moves in a fetus |
| Heart Rate | pulse: the rate at which the heart beats; usually measured to obtain a quick evaluation of a person's health |
| Hypertension | abnormally high blood pressure. |
| Hypotension | abnormally low blood pressure. |
| Lymph Node | each of a number of small swellings in the lymphatic system where lymph is filtered and lymphocytes are formed. |
| Lymphatic System | is part of the circulatory system, comprising a network of conduits called lymphatic vessels that carry a clear fluid called lymph directionally towards the heart. |
| Oval Opening | the passage between the right and left atria of the heart, bypasses lungs delivering most of the oxygenated blood directly to body |
| Plasma | the colorless fluid part of blood, lymph, or milk, in which corpuscles or fat globules are suspended. |
| Platelets | a small colorless disk-shaped cell fragment without a nucleus, found in large numbers in blood and involved in clotting. |
| Pulmonary Circulation | circulation of blood between the heart and the lungs |
| Purkinje Fibres | are located in the inner ventricular walls of the heart, just beneath the endocardium in a space called the subendocardium. essential for maintaining a consistent heart rhythm. |
| SA node | acemaker: a specialized bit of heart tissue that controls the heartbeat |
| Semi-Lunar Valve | The two semilunar (SL) valves, which are in the arteries leaving the heart, are the aortic valve and the pulmonary valve. |
| Septum | a partition separating two chambers, such as that between the nostrils or the chambers of the heart. |
| Systemic Circulation | circulation that supplies blood to all the body except to the lungs |
| Systolic Pressure | the blood pressure (as measured by a sphygmomanometer) during the contraction of the left ventricle of the heart |
| Umbilical Artery | The umbilical artery is a paired artery that is found in the abdominal and pelvic regions. In the fetus, it extends into the umbilical cord. |
| Umbilical Vein | a vein in the umbilical cord; returns nutrient blood from the placenta to the fetus |
| Venous Duct | connects the umbilical arteries to the liver. |
Created by:
Ama B
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