Functions of the cardio-respiratory system

Question 1

what is tidal volume?

Answer 1

the volume of air breathed in or out during a normal breath at rest

Question 2

what is inspiratory reserve volume?

Answer 2

additional air that can be inhaled after the inspiration of a normal tidal volume

Question 3

what is expiratory reserve volume?

Answer 3

additional air that can be exhaled after the expiration of a normal tidal volume

Question 4

what is residual volume?

Answer 4

volume of air that remains in the lungs after maximal expiration

Question 5

What is the pathway of blood?

Answer 5

> Deoxygenated blood into right atrium
then to the right ventricle
pulmonary artery transports deoxygenated blood to the lungs
gaseous exchange occurs (blood becomes oxygenated)
pulmonary vein transports oxygenated blood back to left atrium then to left ventricle
oxygenated blood is ejected and transported to the body through the vena cava

Question 6

What is the formula for cardiac output?

Answer 6

Stroke volume x heart rate

Question 7

How is the alveoli adapted for gaseous exchange?

Answer 7

>Large surface are
>moist thin walls 
>short diffusion pathway
>lots of capillaries
>large blood supply