what is the circulatory system a series of?
a series of tubes or vessels that carry blood to ALL parts of the body
what are the major components of the circulatory system?
heart
blood vessels
capillaries
blood
what does EACH major component do for the body?
heart- pumps blood through the circulatory system
blood vessels- carries blood AWAY from the heart and carry blood BACK TOWARDS the heart
capillaries- delivers substances to the cells
blood- medium that transports various substances, eg. water, oxygen
what is the circulatory system a complex of?
a complex network of blood vessels that deliver blood to every cell in the body
what is at the center of the network? and the purpose
the heart, to pump blood around the blood vessels
What can the human circulatory system be described as, and why
a double circulatory system because it has 2 circuits or parts to it
what happens in one circuit?
blood passes through the heart and lungs
what happens in the lungs?
blod absorbs oxygen and releases carbon dioxide and water vapour
what happens in the second circuit?
bloo passes between the heart and rest of the body
essential substances such as oxygen and glucose are carried where?
it is carried to the rest of the body
what happens to the waste produts such as carbon dioxide and urea?
they are removed