37.1-37.2 Circulatory System
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35 Terms
what is the purpose of circulatory system?
carry stuff for and from cells around
what pumps blood?
the heart
what type of blood enters the heart?
oxygen-poor blood
where does blood enter the heart?
superior and inferior vena cava
superior vena cava brings primarily
oxygen-poor blood from upper bodies
inferior vena cava primarily brings
oxygen-poor blood from lower parts of body
arteries…
usually carries oxygen-rich blood from the heart
veins…
usually carries oxygen-poor blood towards the heart
the only artery that carries oxygen-poor blood is the…
pulmonary artery
the only vein that carries oxygen-rich blood is the…
pulmonary veins
the right side of the heart usually has…
oxygen-poor blood
the left side of the heart usually has…
oxygen-rich blood
valves primarily
prevent blood form going back to where it came from
what is the second step of blood entering heart?
right atrium
what comes after the right atrium?
right ventricle
where does blood go after right ventricle?
pulmonary arteries
where does blood go after reoxygenated by lungs?
pulmonary veins
what comes after pulmonary veins?
left atrium
what comes after left atrium?
left ventricle
what comes after left-ventricle?
aorta
what are capillaries?
link arteries and veins, deliver blood to body parts
why are there four chambers?
the two atrias receive blood for the ventricles while the two ventricles do the actual pumping
what part of heart is more muscular?
ventricle
what is pulmonary circulation?
heart to lung
what is systemic circulation?
lung back to heart
what does myocardium do?
muscle that pumps blood
what is blood called?
plasma
plasma composition of water percentage
90%
plasma composition of other stuff
10%
what percent of blood is blood cells?
45%
what percent of blood is plasma?
55%
composition of blood from densest to least dense
red blood cells, white blood cells, platelets, and plasma
what protein do all red blood cells contain?
hemoglobin
what does hemoglobin do?
iron containing protein that binds to oxygen
what do platelets do?
make blood clots to stop blood escape