Respiratory System

Which is the main organ of the respiratory system?

• Heart

• Stomach

• Lungs

• Pituitary Gland

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi
• lungs
• oxygen
• alveoli

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body
• to bring oxygen to the body
• to break down food and absorb nutrients
• to remove oxygen from the body and deliver carbon dioxide

Your lungs are made up of different sections called:

• sections

• tracheas

• lobes

• alveolis

Breathing through your mouth is often healthier than breathing through your nose?

• True

• False

When we breathe out, the ____________ leaves our lungs.

• Carbon dioxide

• Oxygen

Tags

NGSS.5-LS2-1

Germs are tiny living beings so small they cannot be seen without a microscope. Most are bacteria or viruses that can cause illness?

• True

• False

We breathe in carbon dioxide and breathe out oxygen

• True

• False

Tags

NGSS.MS-LS2-3

Which bone structure of the skeletal system helps protect the lungs?

• spinal cord

• cranium

• rib cage

• sternum

A tube that brings air to and from the lungs. Also known as the windpipe.

• Trachea

• Diaphragm

• Bronchi

• Alveoli