Blood Flow Through The Body Flashcards
Blood flow is volume of blood flowing through _ at a given time (3)
Organ
Circulation
Blood vessel
Flow of blood through a vessel is determined by a combination of _ between two ends of vessel
Pressure difference
Determined through pressure difference and _ through the vessel
Resistance of blood flow
Blood pressure is greatest in vessels nearest to the pump, which are _ (2)
Aorta
Pulmonary artery
As blood _ pressure falls
Flows away from the heart
_ has greater influence on blood flow than pressure
Resistance
Total blood flow in circulation of an adult at rest is _ liters per minute
5
Total blood flow in circulation is known as _
Cardiac output
Blood flow to individual tissue is almost precisely controlled in relation to _
Tissue’s needs
When tissues are active, require _ times more blood flow (range)
20-30
Cardiac output cannot increase more than _ to _ times
4
7
Since body cannot increase total blood flow, local blood flow to specific tissues controlled by _
Internal monitoring system
Blood flow distributed according to _
Specific tissue needs
Blood redirected away from tissue that does not require _ at that time (2)
Oxygen
Nutrients
No _ in veins
Pulse
_ helps push venous blood back to heart
Contraction of limb muscles
_ helps get blood back to heart from veins
Valves
_ sucks blood through veins towards chest
Breathing
