these are not called blood tubes they are called blood vessels and their are three types of blood vessels
arteries which divides into arterioles and arterioles re divide into capillaries capillaries join to form venule and venule join to form veins.
The blood flows though the heart.Often the heart needs fresh blood.
Blood leaves the heart through arteries. Blood returns to the heart via veins.
Arteries, vessels and veins.
the three main tubes that blood can pass through in the circulatory system are the arteries, veins, and capillaries.
the heart pumps the blood to different part of the body
the heart pumps the blood to different part of the body
The tiniest tubes that carry blood are the capillaries. These connect arteries and veins.
Blood vessels are the tubes through which blood travels. They include veins, capillaries, and arteries.
blood vessels
there are holes/tubes in each valve, and as air passes through them different sounds come out when you change the path.
Blood vessels are any of the tubes through which blood flows through the body.
Tubes in the kidney. I'm not sure what they are called, though.
For different blood types.
blood vessels
Tubes that carry blood are collectively known as blood vessels. These include veins, arteries, and capillaries.