Ch 7 The Breathing System

Question 1

What is our breathing system made up of

Answer 1

Nose
• Trachea
Bronchi and bronchioles
Alveoli
• Diaphragm
• Ribs and intercostal muscles

Question 2

Why do we breath through our nose?

Answer 2

Hairs and mucus trap dirt particles and bacteria in the nose

Air is warmed and moistened as it passes through the nose.
Warm and moist air helps oxygen to pass from the lungs into the bloodstream more easily.

Question 3

Why do we breath through our nose?

Answer 3

Hairs and mucus trap dirt particles and bacteria in the nose

Air is warmed and moistened as it passes through the nose.
Warm and moist air helps oxygen to pass from the lungs into the bloodstream more easily.

Question 4

What is the trachea

Answer 4

The trachea, or windpipe, carries air to and from the lungs.

Question 5

What are the Bronchi and bronchioles

Answer 5

We have two bronchi. Each bronchus carries air between the trachea and a lung. The two bronchi subdivide many times to form tiny tubes called bronchioles. Bronchioles carry air to and from the air-sacs, or alveoli.

Question 6

Alveoli’s function

Answer 6

Oxygen passes from the air in the alveolus into the blood vessels
• At the same time carbon dioxide and water pass from the blood vessels into each alveolus
• The gases pass in each direction by a process called diffusion.
As an adaptation for diffusion each alveolus has a very thin lining, is moist and is surrounded by many tiny blood vessels called capillaries.

Question 7

What is the diaphragm

Answer 7

The diaphragm is a sheet of muscle that forms the base of the chest. Along with the ribs and intercostal muscles (located between the ribs) the diaphragm causes air to move into or out of the lungs.