Respiratory System

Question 1

what is the movement of air in the respiratory system?

Answer 1

1) air is inspired through mouth/nose containing oxygen
2) drawn into lungs and transferred to circulatory system
3) carbon dioxide passes out of the blood plasma into the lungs
4) this is then expired

Question 2

what are alveoli?

Answer 2

one cell thick
allow oxygen to move from lungs into capillaries
external respiration

Question 3

what are cilia?

Answer 3

lines the respiratory system before entering the lungs
secrete mucus
tiny hair-like projections
the mucus helps to trap dust particles and bacteria before they reach the alveoli

Question 4

what is the average ventilation rate?

Answer 4

16 times a minute