Respiratory system

Label the respiratory system in order of air inhalation.

a

b

c

e

f

g

h

d

Larynx

Bronchioles

Nasal passages

Alveoli

Trachea

Bronchi

Pharynx

Nostrils

The type of tissue lining the trachea is​ (a)   , with finger-like protrusions called​ (b)   .

• epithelia
• cilia
• smooth muscle
• cardiac muscle
• neural
• villi
• papillae

What part of the respiratory system warms air to keep the alveoli moist?

• Nasal cavity

• Lungs

• Nostrils

• Larynx

What is the function of the alveoli and gaseous exchange?

(Pick 3 answers)

• Allow larger quantities of oxygen into the blood (increased surface area).

• Facilitate removal of carbon dioxide from the body.

• Maintain pressure within the thoracic cavity.

• Diffusion of oxygen into the blood.

• Trap pathogens and prevent entrance into the body.

Nitrogen content does not change because​ it is (a)   .

• not involved in gaseous exchange
• used in diffusion
• not a breathable element 

What muscles help the ribcage expand and contract during respiration?

e

f

External intercostal muscles

Outer diaphragm

Internal intercostal muscles

Major pectoral

Inner diaphragm

Minor pectoral