Human Body

The ______ breaks down large food particles into very small particles.

These small particles are absorbed into the bloodstream through the ______.

• mouth, kidneys
• stomach, small intestine
• small intestine, stomach
• digestive system, nervous system

Which of the following is correct?

• When the heart contracts, it fills with air from the atmosphere
• When the heart expands, it fills with air from the atmosphere
• When the lungs expand, they fill with air from the atmosphere.
• When the lungs contract, they fill with air from the atmosphere

Shabrydis eats a ham sandwich. What is the first organ that digests the eaten sandwich?

• mouth
• esophagus
• small intestine
• large intestine

The picture below shows the stomach and intestines. These organs allow a person to grow and survive by helping the body: 

• get air from food
• clean the air before it enters your lungs
• get energy out of food
• respond to signals from your skin

Which organ of the body is mainly responsible for removing waste from  the blood?

• large intestine
• lungs
• kidney
• heart

What is the one organ that controls all of the systems of the body?

• brain
• blood
• heart
• lungs

Which organ stores waste produced by the kidneys?

• pancreas
• gall bladder
• bladder
• large intestine

The average adult human skeleton contains about 206 bones. The bones of the skeleton are located in almost every part of the body.

The skeleton is an important part of the body because it

• protects your organs
• supports the body
• helps the body move
• all of these

The stomach and intestines are organs of the body system which _______.

• pumps blood
• digests food
• processes information
• stores waste

There are three main types of muscles in the human body. Smooth muscle lines many organs, such as the stomach and intestinal tract. Cardiac muscle is found in the heart. Skeletal muscle is found near the bones of the skeleton.

What is the function of cardiac muscle? 

• Cardiac muscle helps keep the bones of the skeleton together and helps them move properly
• Cardiac muscle is used to help the heart beat properly
• Cardiac muscle helps the digestive system contract and move fluids and solids through it
• Cardiac muscle helps to store nutrients in the body