Chapter 3 Flashcards
cardiorespiratory system
composed of the respiratory and cardiovascular system
cardiovascular system
Blood vessels, blood, and the heart
Arteries
carry blood away from the heart to rest of body
veins
return blood to the heart form rest of body
stroke volume
the amount of blood pumped out the heart with each contraction
cardiac output equation
heart rate x stroke volume, the overall performance of the heart
sinoatrial node (SA node)
the “pacemaker” of the heart because it initiates heartbeat
What is the typical heart rate for an adult
70-80 BPM
What is the role of the right atrium
receives blood coming from the body (oxygen poor)
what is the role of the left atrium?
receives the blood (oxygen-rich) that comes from the lungs and heart
Right ventricle
thinner walls, only pumps blood back to heart and the lungs
left ventricle
thicker walls, much higher pressure pump, pushes blood to rest of the body
functions of blood
protection, regulation transportation
protection of blood
white blood cells protect your body against diseases and blood clotting helps with fluid loss
regulation of blood
blood helps keep a stable body temperature, electrolyte and water level as well as PH