The Respiratory System

Inhale!!!!

Your lungs are ___________ air.

• taking in

• letting out

EXHALE!!!

My lungs are __________________ air.

• taking in

• letting out

What is the main function of the respiratory system?

• to inhale oxygen and exhale carbon dioxide

• to fight off germs and illness

• to break down food and absorb nutrients

• to move blood around the body

The two main branches from the trachea (one to each lung) are called _____________.

• bronchi

• alveoli

• bronchioles

• cilia

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

• bronchi

• lungs

• alveoli

• cilia

The diaphragm is a muscle that is part of the respiratory system. What does the diaphragm do?

• It warms up air as it enters the body

• It cleans the air you breathe before it enters the lungs

• It helps the lungs breath air in and out by contracting and relaxing

What is mucus?

• a group of hairlike cells that clean air as it enters your trachea

• a thick, sticky fluid that traps harmful dust and germs, which may be in the air you breathe

• small, narrow tubes inside the lungs

Tiny hairs called ____________ trap dirt and particles from the air that you breathe.

• alveioli

• lungs

• edges

• cilia

This is an example of a/an _____________.

• organism

• organ system

• organ

• tissue

What is the difference between a cell and a tissue?

• cell is the basic unit of life; tissue is a group of cells that work as one

• cell is a group of organs; tissue is group of different cells

• cell is basic unit of life; tissue is a group of organs that work as one