The cardiovascular systems function is pump blood through our bodies so it can exchange nutrients and materials with other body
cells and tissue to be
released from the body. A common example of this is carbon
dioxide. When blood is pumped from the heart,
it enters the aorta which branches off to other arteries, that branch to arterioles, that further branch out to capillaries. This is where
a lot of the exchange of materials happen. Oxygen is transported to the capillaries and exchanged for carbon dioxide. The carbon dioxide
then makes the journey back to the heart via venules and then veins until it reaches the heart and is circulated through the lungs.
In the lungs there are sacs called alveoli which take exchange oxygen for carbon dioxide.
This carbon dioxide is then released form the body via exhalation.
it enters the aorta which branches off to other arteries, that branch to arterioles, that further branch out to capillaries. This is where
a lot of the exchange of materials happen. Oxygen is transported to the capillaries and exchanged for carbon dioxide. The carbon dioxide
then makes the journey back to the heart via venules and then veins until it reaches the heart and is circulated through the lungs.
In the lungs there are sacs called alveoli which take exchange oxygen for carbon dioxide.
This carbon dioxide is then released form the body via exhalation.
How does the heart pump all the oxygen, blood and materials though the body?
Blood pressure!
(There is actually a lot of factors that play into transporting materials through the body, but we are going to focus on blood pressure)
http://www.phschool.com/science/biology_place/biocoach/cardio2/factors.html
Blood pressure is the pressure that is excerted on the vessel walls by blood pumping in and out of the heart.
When the heart is filling = Diasole pressure (70 mm Hg)
When the heart is pumping = Systole presuure (120 mm Hg)
Blood pressure is highest in the arteries and lowest in the veins. This is because blood
Blood pressure is the pressure that is excerted on the vessel walls by blood pumping in and out of the heart.
When the heart is filling = Diasole pressure (70 mm Hg)
When the heart is pumping = Systole presuure (120 mm Hg)
Blood pressure is highest in the arteries and lowest in the veins. This is because blood
pressure drops as
arteries branch out further away from the heart.