The respiratory system

Question 1

What is the most important function of the respiratory system?

Answer 1

Respiration. The acquisition and carriage of oxygen to all of the cells in the body and the excretion of CO2 from all cells and expulsion into the environment.

Question 2

What is the difference between internal and external respiration?

Answer 2

Internal respiration is the exchange of oxygen and carbon dioxide between cells and the blood at the level of the capillaries. External respiration is the exchange of oxygen and carbon dioxide that occurs in the lungs.

Question 3

What are the secondary functions of the respiratory tract?

Answer 3

Voice production, body temperature regulation, acid-base balance regulation, and sense of smell​.

Question 4

What do the nasal passages do to inhaled air?

Answer 4

They warm , humidify and filter it.

Question 5

Describe the components of the upper respiratory tract

Answer 5

All structures outside the lungs. These are the nostrils, the nasal passages, the pharynx, the larynx and the trachea.

Question 6

Describe the components of the lower respiratory tract

Answer 6

All structures within the lungs. These are bronchi, bronchioles, alveolar ducts and alveoli.

Question 7

What do the nasal passages do?

Answer 7

Warms, moistens and cleans air that is breathed in.

Question 8

What does the larynx do?

Answer 8

It deliver air to the trachea while preventing food from entering the trachea

Question 9

What part of the larynx prevents food from entering the trachea during swallowing?

Answer 9

The epiglottis

Question 10

What direction does the mucus in the nasal passages move in?

Answer 10

Caudally to the throat where it can be swallowed.

Question 11

Where is the trachea located and what are its functions?

Answer 11

It is located between the larynx and the bronchi. It delivers air to the bronchi and helps to clean it before it enters the lungs.

Question 12

What do alveoli do?

Answer 12

They are the site of the exchange of Oxygen and Carbon Dioxide between blood and air.

Question 13

Describe the location of the mediastinum

Answer 13

In the thoracic cavity between the lungs.

Question 14

List the normal ranges for the breathing rates of cats and dogs

Answer 14

Cats - 20-40 breaths per minute (bpm)
Dogs - 12-40 bpm

Question 15

What do the nasal passages do to inhaled air?

Answer 15

They warm , humidify and filter it.