veins
what do veins carry?
blood
what do arteries carry?
rich blood
how big is the average human heart
2 adult hands held together
What does blood transport
Hormones, nutrients, oxygen, and antibodies.
where do they veins carry blood to?
lungs
where does the arteries carry the blood?
away from the haert
how does the heart work
It acts like a pump
do you need blood?
yes
what are veins?
A thing in the circulatory system that carries blood to lungs.
carries blood away from the heart to different areas of the body
what is the purpose of the heart
To keep the circulatory system working.
What is the main purpose of the blood
To transport vital substances, remove waste, and protect the body from infection