what organ is responsible for the blood?

• snow

• the brain

• the heart

• the lungs

In total, how many chambers does the human heart have?

• 4 chambers

• 1 chamber

• 8 chambers

• 6 chambers

Which blood vessels carry blood back to the heart?

• xylem

• neurons

• arteries

• veins

Oxygen and carbon dioxide can diffuse through the walls of what blood vessels?

• neurons

• Capilarys

• cell walls

• organs

The tiniest blood vessels are...

• arteries

• capillaries

• ice cream

• neurons

What system is responsible for the transport of oxygen and nutrients to all body cells?

• neurons

• the brain

• circulatory system

• organs

What blood vessels carry blood with oxygen and nutrients away from the heart to the cells of the body?

• the cell wall

• cell tissue

• Aordia

• circulatory system

Which blood vessels carry blood back away from the heart?

• neurons

• veins

• xylem

• arteries

What is the main function of the heart?

• to help us breathe

• to move blood through the body

• to keep us alive

• to make more cells

What is plasma?

• Plasma creates scabs

• liquid that materials in the blood travel through

• Is our blood

• helps us breathe