7.12b

What organ pumps blood throughout your body?

• veins

• arteries

• heart

• blood vessels

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

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

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

The ____________ is a muscular organ that pumps blood to the body through blood vessels. 

• vein 

• artery 

• heart

Which organ squeezes and mixes your food into a mushy liquid?

• mouth

• stomach

• large intestine

• small intestine

Which of the following best describes the job of the skeletal system?

• Gives shape and support to the body.

• Sends messages from the stomach to the brain.

• Brings in and breaks down all nutrients for the body

The adult skeletal system is composed of how many bones?

• 216

• 371

• 206

• 199