​ (a)   are the part of the blood that fight off infection

• White Blood Cells
• Red Blood Cells
• Platelets
• Plasma

What does the blood transport?

• Oxygen

• Nutrients

• Waste

• Hormones

• All of these things

What is the largest and thickest blood vessel in the human body?

• Veins

• Carotid

• Jugular

• Aorta

​ (a)   are the part of the blood that make scabs

• Platelets
• Red Blood Cells
• White Blood Cells
• Plasma

What is you heart made of?

• Cardiac Muscle

• Blood

• Veins

• Blood Vessels

The human heart has _____ chambers

When breathing, ​ (a)   leaves the blood and enters the lungs

• Carbon Dioxide
• Oxygen

​ (a)   are where materials in the blood are delivered to the cells

• Capillaries
• Veins
• Arteries

When the diaphragm contracts, you ​ (a)  

• inhale (breathe in)
• exhale (breathe out)

The function of the respiratory system is to take in ​ (a)   , and remove​ (b)   .

• Oxygen
• Carbon Dioxide
• Nitrogen
• Carbon Monoxide