PE The Cardiovascular And Respiratory System Flashcards
structure of the arteries
thick muscular walls and small lumen
function of the arteries
carry oxygenated blood away from the heart under high pressure
structure of the veins
they have thinner walls and a larger lumen
function of the veins
carry deoxygenated blood back to the heart under low pressure
structure of the capillaries
one cells thick
function of the capillaries
link the veins and arteries together and are used for gaseous exchange
what is stroke volume ?
the amount of blood pumped out of the heart by each ventricle per contraction
what is cardiac output ?
is the volume of blood ejected from the heart in the minute
what is heart rate ?
is the number of times the heart pumps is one minute
what is vasoconstriction ?
narrowing of the internal diameter of blood vessels
to restrict the blood flow through them
this is done to restrict the amount of blood going to inactive areas in sport
what is vasodilation ?
widening of the internal diameter of blood vessels to increase blood flow through them
this is done in sport to increase the amount of blood traveling to the active areas
what is diastole ?
when chambers of the heart relax and fill with blood
what is systole ?
when the chambers of the heart contract and empty, when blood is ejected from the heart
what is the respiratory system ?
the system that brings in oxygen to the body so it can be used to produce energy
what is the pathway of air through the body ?
- air enters through the mouth/nose
- travels down the trachea
- this connects to the lungs
- then it passes through bronchi and the bronchioles and into the alveoli where gaseous exchange takes place