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When we inhale, air goes through a tube called the..

• lungs

• windpipe

• diaphragm

• nose

The process of breaking food down into simpler substances that the body can use is called...

• Circulation

• Chewing

• Excretion

• Digestion

Identify the body system.

• Nervous System

• Circulatory System

• Respiratory System

• Skeletal System

Name the system which works closely with the respiratory system.

• Digestive system

• circulatory system

• nervous system

• muscular system

In which system of the human body does the heart belong?

• Nervous

• Skeletal

• Circulatory or Cardiovascular

• Digestive

Which system permits blood to circulate and transports nutrients around the body?

• Nervous
• Respiratory
• Circulatory
• Digestive

Which describes all the parts of the circulatory system?

• heart, lungs, stomach, muscles

• heart, blood, arteries, and veins

• bones, skin, hair

What is the main organ of the circulatory system?

• Brain

• Heart

• Stomach

The job of the heart is to . . .

• pump blood around the body.

• break down food

As the blood reaches the lungs, what is removed from the blood?

• Oxygen

• Carbon dioxide

• Red blood cells

• White blood cells