The respiratory system

What is the function of the respiratory system?

• To pump blood

• To provide a constant supply of oxygen

• To chew food

What is the main organ of respiratory system?

• Liver

• Stomach

• Lungs

What does mouth and nose in respiratory system do?

• Bring in carbon dioxide

• Bring air into the body

What do nasal hairs do?

• Breathe oxygen

• Clean the air

• Trap dust

What is a trachea?

• The vocal cord

• The throat

• The windpipe

What does alveoli have?

• A network of arteries

• A network of capillaries

• A network of veins

What do we call a muscle wall between the chest and the abdomen of the body uses for breathing?

• The Larynx

• The Bronchioles

• The Diaphragm

The trachea has rings of ________.

• muscles

• cartilage

• bones

Which organ allows gas exchange?

• Liver

• Lungs

• Heart

Alveoli have ________.

• small surface area

• large surface area