Circulation Flashcards
The blood delivers what to our body cells?
oxygen and nutrients
What’s an artery?
it carries blood away from the heart
What’s a vein?
it carries blood to the heart.
The way the blood flows for the artery and the vein is exceptional for what?
the pulmonary circulation
Gas exchange occurs in what?
In the capillaries
What are the two types of circulation?
1- systemic
2- pulmonary
What is systemic?
it carries oxygen and nutrients to the body cells.
The lungs deliver ________ blood to the body? and the ________ blood from the body.
oxygenated, deoxygenated
What is pulmonary?
it carries deoxygenated blood to the lungs to get rid of it
the body receives oxygenated blood from the ______.
lungs
The _____ delivers the deoxygenated blood to the lungs.
heart
What propels the blood/circulates it?
the heart
How many chambers does the heart have?
four
What is the role of the valve?
to pump blood from chamber to chamber and to keep the blood flowing in one direction
When does your heart beat the fastest. name three things?
1- exercise
2- scared
3- nervous
when does your heart beat the slowest?
when your sleeping
Why is exercise good for your heart?
when your muscles need more oxygen it forces the heart to beat faster which strengthens the heart
What makes the heart contract?
electricity
What sends electricity to the heart?
the patch of nerves on the right side of the heart
What is the name of the natural pace maker?
Sinoatrial nerves
What happens when you have a heart attack?
the fat clogs the blood vessel so the muscles down stream are deprived of oxygen
How do the walls of the artery compare to those of the vein?
There are the same amount of layers but the walls are thinner for the veins.
Blood always circulates in the _____ direction.
Same.
Blood circulates ________.
Continuously.
