Chapter 22- Respiratory System

Question 1

Nasal cavity

Answer 1

Hair and mucus filter air, thin layer of blood vessels warms it

Question 2

Pharynx

Answer 2

Connection between nasal and oral cavity, uvula closes off nasal cavity when swallowing, ear canal entrance location

Question 3

Larynx

Answer 3

“Voice box” vocal cords, Adam’s apple, epiglottis

Question 4

Trachea

Answer 4

“Wind pipe” air transport, cartilage formed into C shapes to keep trachea open

Question 5

Bronchi

Answer 5

Branch from trachea into two parts (one for each lung)

Question 6

Bronchioles

Answer 6

Smaller air conducting passages

Question 7

Alveoli

Answer 7

Tiny air sacs surrounded by capillaries, area of gas exchange

Question 8

Why is there a size difference between the left and right lung?

Answer 8

The left lung which has two lobes, compared to the right lung, which has three lobes, sits directly in front of the heart

Question 9

Diaphragm

Answer 9

Muscle that lungs rest on

Question 10

Intercostal muscles

Answer 10

Muscles between the ribs

Question 11

What happens when inhaling?

Answer 11

Intercostal muscles and diaphragm contract, lung volume increases, pressure decreases

Question 12

What happens when exhaling?

Answer 12

Intercostal muscles and diaphragm relax, lung volume decreases, and pressure increases

Question 13

What is the point of the respiratory system?

Answer 13

To gain useable energy and to get rid of carbon dioxide