Main Functions of the Human Body Systems

What organ pumps blood throughout your body?

• veins
• arteries
• heart
• blood vessels

What are the main organs in the respiratory system?

• heart
• lungs
• stomach
• intestines

Our lungs ...

• breathe in oxygen and breathe out carbon dioxide.
• breathe in carbo.
• breathe in helium and breathe out oxygen.
• breathe in oxygen and breathe out helium.

What is another word for your windpipe?

• esophagus
• sinuses
• trachea
• alveoli

Your _______ is a muscle connected to the bottom of your lungs that helps your lungs expand and contract when you breathe.

• esophagus
• alveoli
• trachea
• diaphragm

The breakdown of food into small molecules, which are then absorbed into the body is the main function of which body system.

• integumentary system

• digestive system

• excretory system

• endocrine system

This human body system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.

• nervous system

• integumentary system

• respiratory system

• excretory system

This system functions to transport blood and oxygen from the lungs to the various tissues of the body.

• nervous system

• circulatory system

• endocrine system

• integumentary system

Which body system converts food into simpler substances for the body to absorb as nutrients?

• Digestive system

• Excretory system

• Circulatory system

• Muscular system

The main function of the circulatory system is to -

• support and protect delicate organs such as the brain, lungs, and hear

• protect the body against invading organisms and infectious diseases

• pump oxygen and nutrients through the blood to every part of the body

• coordinate all actions and reactions of the body using electrical signals