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Circulatory system 1
Components & Functions
| Term | Definition |
|---|---|
| aorta | largest artery in the body |
| vena cava | the largest vein in the body |
| atrium | the upper chamber of the heart |
| ventricle | the lower chamber of the heart |
| mitral valve | valve between the left atrium and the left ventricle, also called bicuspid valve |
| tricuspid valve | located between the right atrium and the right ventricle |
| pericardium | double-layered membrane surrounding the heart |
| myocardium | muscular, middle layer of the heart |
| endocardium | inner lining of the heart |
| artery | largest type of blood vessel; carries blood away from the heart to all parts of the body |
| vein | thin-walled vessel that carries blood from body tissues and lungs back to the heart |
| arteriole | small artery |
| venule | small vein |
| capillary | smallest blood vessel |
| erythrocyte | red blood cell |
| leukocyte | white blood cell |
| thrombocyte | platelet |
| septum | the dividing wall between the right and left sides of the heart |
| circuit | pathway, circulation |
| interatrial septum | separates the two upper chambers of the heart |
| interventricular septum | separates the two lower chambers of the heart |
| diastole | relaxation phase of the heartbeat |
| systole | contraction phase of the heartbeat |
| pulse | the beat of the heart as felt through the walls of arteries |
| valve | structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction |