cardiovascular (3) Flashcards
what controls extrinsic control of the heart
nerves of the autonomic nervous system
what speeds up the heart
sympathetic cardiac nerves
what slows the heart
vagus sympathetic nerve
intrinsic nervous control is built within the heart, What does it consist of
S-A node
A-V node
septal bundles
Coronary arteries supply what to heart walls
nutritive blood
Where are coronary arteries
arise from base of aortic arch and spread over surface of heart
where do cardiac veins empty blood to
right atrium
what is pericardium
special serous sac surrounding heart
reduces friction on moving surfaces
why is cardiovasc. system considered closed
At no place is whole blood ever outside the system
why is c.v. system considered 2-cycle
blood passes thru the heart twice with each complete circuit of body
describe collateral circulation
if blood vessel is damaged another blood vessel will continue to supply.
if end artery is damage, it dies.
What arteries supply head
Carotid arteries
what arteries supply neck and upper members
subclavian arteries
what arteries supply pelvic region and lower members
R. & L iliac arteries
