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Circulatory system
Honors bio flashcards about the circulatory system
Term | Definition |
---|---|
adenosine triphosphate | energy molecule also known as ATP |
Vena cava | deoxygenated blood enters the heart through either the superior vena cava or inferior vena cava |
right atrium | this is where the deoxygenated bloods goes to once it enters the vena cava |
Atrioventricular valve | the right atrium contracts and pushes the deoxygenated blood through this valve, into the right ventricle |
Tricuspid valve | another name for the atrioventricular valve, due to its shape |
right ventricle | this is the second holding place for the deoxygenated blood |
pulmonary artery | when the right ventricle contracts, it sends the deoxygenated blood into the pulmonary artery through the pulmonary valve |
Blood to the lungs | deoxygenated blood enters the lungs through the pulmonary arteries |
Right side of the heart | deoxygenated |
Aorta | biggest blood vessel in the body |
Circulatory system | transports nutrients, oxygen, and other substances throughout the body, and removes wastes from tissues |
Upper chambers/atrium | receives blood from body or lungs |
Lower chambers/ventricle | pumps blood out of the heart and into the body |
Coronary arteries | branch out from the aorta, supply blood to the heart, are relatively narrow |
Heart attack | heart cells run out of oxygen and could die, usually happens during a coronary artery block |
Pulmonary circulation | oxygen poor blood being pumped into the right side of the heart then to the lungs |
Systemic circulation | Left side of the heart pumps oxygen rich blood to the rest of the body through the aorta |
Artery structure | large vessels, thick elastic wall helps withstand powerful pressure |
Artery function | carry blood from heart, all carry oxygen rich blood |
Vein structure | flows against gravity through large veins, veins contain valves, contracting skeletal muscles squeeze vein pushing blood toward heart, valve farthest from heart closes to ensure blood flows in one direction |
Vein function | blood returns to heart through veins |
Capillary structure | smallest blood vessels, very narrow, thin walls |
Capillary function | side streets/alleyways of circulatory system, blood passes through them in single files, allows nutrients and oxygen to diffuse from blood into tissues |