It is the network of organs and tissues that help you breathe.

• digestive system

• nervous system

• circulatory system

• respiratory system

What is the purpose of the respiratory system?

• takes in oxygen and releases nitrogen

• takes in carbon dioxide and releases oxygen

• takes in oxygen and releases carbon dioxide

• takes in nitrogen and releases oxygen

Openings that pull air from outside your body into your respiratory system.

• sinuses

• mouth and nose

• bronchial tubes

• lungs

Passage connecting your throat and lungs.

• pharynx

• bronchial tubes

• diaphragm

• trachea

Bones that surround and protect your lungs and heart.

• ribs

• diaphragm

• pleura

• larynx

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.

• bronchioles

• lung lobes

• alveoli

• capillaries

Tags

NGSS.MS-LS1-3

Hollow organ that allows you to talk and make sounds when air moves in and out.

• pharynx

• larynx

• trachea

• cilia

Our respiratory system helps us...

• absorb oxygen into our body.

• absorb nutrients from the food that we eat.

• protect our body from bacteria

• circulate oxygen

Muscle that helps your lungs pull in air and push it out.

• diaphragm

• alveoli

• heart

• trachea

This area warms, moisturizes, and filters air before going to the lungs.

Which system does this image represent?oes this image represen

• trachea

• nose

• mouth

• nasal cavity