Hornet Sting

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The heart helps circulate blood. The heart is a type of _____.

What connects skeletal muscles to bone?

Which two systemswork together to make sure that oxygen reaches the blood stream and carbon dioxide is removed from the bloodstream?

The _____ blood cells help the immune system fight infections.

The human heart has _____ chambers.

A group of tissues working together make a(n) _____.

What blood vessels take blood away from the heart after oxygen is added?

A _____ is a type of muscle that moves the heart.