Complex medium
If you're talking about transporting materials into and out of the cells, they would be diffusion, osmosis, neither of which requires the use of energy; and active transport, which does require energy.
your heart,blood,veins,red blood cell,white blood cell
The major organ in the body is the heart.The heart is an organ which pumps out blood and make the blood travel the whole body of a human.Your heart is in the middle of your chest between your lungs.Inside your heart are blood cells and many tubes where blood travels and also these tubes are connected to your capillaries (the smallest blood vessels in the human body).Not just the heart pumps,your pulse will also pumps.
We know that same blood passes two times through the heart i.e. 1) blood from heart to the lungs and 2) lungs to the heart for circulation in body. That's why circulation of blood in human beings is called double circulation.
A giraffe, they, and their hearts, are many times larger than a human and a human heart
Complex medium
Blood is pumped by the heart.
The main transport medium in humans is blood.
The heart pumps blood.
When your heart beat's it push's the blood around the human body.
the heart pumps blood around the human body
A blood vessel that carries blood back to the heart.
it pumps blood around the body. if the human heart stops it means your dead
If you're talking about transporting materials into and out of the cells, they would be diffusion, osmosis, neither of which requires the use of energy; and active transport, which does require energy.
The heart.
The Heart
4-5 ltrs in human body.