Lesson 2-Circulatory and Respiratory Systems

______ brings food, water, and oxygen to every body part. (page 70)

• Muscles

• Lungs

• Blood

• Bones

The _____ pumps blood through the body. (page 70)

• heart

• lungs

• skeleton

• brain

The heart pumps blood in a cycle called a ______. (page 70)

• breathing

• muscle

• vein

• heartbeat

The heart squeezes blood out through tubes called _____. (page 71)

• arteries

• veins

Blood returns to the heart through tubes called _____. (page 71)

• arteries

• veins

Your pulse tells how fast or slow your heart is beating. (page 71)

• true

• false

______ brings air into the body. (page 72)

• The heart

• Breathing

• The skeleton

• Your pulse

When you breathe your blood gets carbon dioxide from the air and removes a waste gas called oxygen. (page 72)

• true

• false

Tags

NGSS.MS-LS1-3

The ______ is where air enters the blood. (page 72)

• lungs

• heart

• skeleton

• muscles

A muscle called the _____ works to empty and fill the lungs. (page 73)

• diaphragm

• lungs

• heart

• bicep