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- -blood travels to body cells
- -pumped from left side of heart to body then back through right atrium
Deoxygenated blood goes from right ventricle to the lungs and returns through the left side of the heart
- Oxygenated blood travels through tissues of the heart
- Oxygenated blood from left ventricle leaves from 2 openings in the aorta
- -controls heart beat
- -wall on right atrium
- -generates electrical impulses
- -causes atrias to relax and contract
- -base of right atrium
- -delays impulse
- -Allows ventricles to fill with blood
Atrial excitation begins and atria contracts. Av valve opens,semilunar valve closes
Ventricular exvitation and ventricles contract. Av valve closes and semilunar valve opens.
Ventricles relax. Av valves open and semilunar valve closes
Influences on the heart rate
- -body temp
- -too much blood in aorta
- -too much blood in venacava
- -increased blood CO2
- -chemical stimuli
Indicators of cardiovascular health
- Heart rate'beats/min'
- Stroke volume'mL/min'
- Cardiac output'mL/min'
Ability of the ventricles to fill up and empty-stretch and strength-
Why does a short recovery time mean good cardiovascular health?
CO2 is let out and there is efficient gas exchange
Label the diagram
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