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Science test 7: circulatory system
Terms in this set (45)
1. carries needed substances to cells
2. carries waste products away from cells
3. blood contains cells that fight disease
What are the functions of the cardiovascular system?
2. right and left atrium
3. right and left ventricle
7. pulmonary artery
8. pulmonary veins
9. superior and inferior vena cava
What structures are in the heart?
1. right atrium
2. left atrium
3. right ventricle
4. left ventricle
What chambers are in the heart?
separates left and right atriums and ventricles
What does the septum do?
receives deoxygenated blood through the vena cava.
What does the right atrium do?
receives oxygen-rich blood through pulmonary veins
What does the left atrium do?
receives deoxygenated blood from the right atrium and pumps deoxygenated blood to the lungs
What does the right ventricle do?
receives oxygenated blood from left atrium and pumps the blood to the rest of the body
What does the left ventricle do?
sends signals to make heart contract
*in right atrium
What does the pacemaker do?
prevents blood from flowing backward
What do valves do?
carries oxygen rich blood from left ventricle to other parts of the body
What does the aorta do?
carries deoxygenated blood from the heart to the lungs
*one of the only arteries that carries deoxygenated blood
What do the pulmonary arteries do?
receives oxygenated blood from the lungs. drains into left atrium
What do the pulmonary veins do?
carries deoxygenated blood from the head and neck into the right atrium
What does the superior vena cava do?
carries deoxygenated blood from lower body into the right atrium
What does the inferior vena cava do?
What is the structure that carries blood to the lungs?
What is the structure that carries blood from the lungs?
What is the largest vein in this diagram that takes in blood from the whole body?
What is "h"?
What is "f"?
What is "e"?
What is "b"?
What is "q"?
What is "o"
superior vena cava
What is "L"?
inferior vena cava
What is "r"?
What are "c" and "p"?
What are the 3 types of blood vessels?
carries blood away from heart
contract and relax to regulate blood flow
What do arteries do?
carries blood to heart
blood enters veins from capillaries
*valves are in veins
What do veins do?
exchanges substances between blood and body
blood flows from arteries to here
What do capillaries do?
smooth muscle cells
What are arteries made up of?
only one cell thick
What are capillaries made up of?
What are veins made up of?
deoxygenated blood is pumped from right ventricle through the pulmonary arteries to the lungs. In the lungs, oxygen is absorbed into the bloodstream and carbon dioxide is released from the blood. Oxygenated blood returns to the heart into the left atrium.
Explain what happens in the loop that goes to the lungs and back. (pulmonary circuit)
oxygenated blood from the lungs goes into the left atrium then flows into the left ventricle. left ventricle pumps it into the aorta and is pumped through the rest of the body. oxygen is diffused into body cells and carbon dioxide is picked up from it. blood returns to heart deoxygenated
Explain what happens in the loop that goes to the rest of the body. (systemic circuit)
when blood goes through right atrium, it is deoxygenated. the blood goes through the right ventricle into the pulmonary artery to the capillaries in the lungs. oxygen is diffused into bloodstream and carbon dioxide is diffused into lungs. oxygenated blood is brought back into left atrium. the blood there goes to the left ventricle and out the aorta to the rest of the body. the oxygenated blood delivers oxygenated blood to the body cells and takes carbon dioxide along with other waste materials. deoxygenated blood is brought back through the right atrium and the process starts again. If the blood didn't become oxygenated, then the body cells wouldn't have oxygen.
How do the loops work together?
What is the largest artery?
vena cava (superior and inferior)
What is the largest vein?
plasma, platelets, red blood cells, and white blood cells
What four things are the blood made out of?
plasma- 53% to 54%
red blood cells- 45%
white blood cells- 1%
What are the percentages of materials that the blood is made out of?
the force of pressure put against the walls of blood vessels. caused by force in which ventricles contract.
*the further from the heart, the less the pressure
What is blood pressure?
top- pressure when ventricle contracts
bottom- pressure when ventricle relaxes
What do the numbers on the top and bottom stand for?
What is the normal blood pressure?
blood pressure cuff
What is used to measure blood pressure?
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