why does blood flow from point a to b?
2007-03-21 13:09:23 · 6 answers · asked by rebaf@sbcglobal.net 1 in Health ➔ Diseases & Conditions ➔ Heart Diseases
Everybody's answer above is correct. They only neglected to mention that the reason the blood does not flow backward is, the veins have one-way valves. When the heart contracts the valves in the veins open and the blood flows forward. When the heart expands to receive more blood, the valves in the veins close so that the blood does not flow back from the way it came.
2007-03-21 15:18:48 · answer #1 · answered by harri_pitts 3 · 1⤊ 0⤋
Because our heart is working as a pump and pumping the blood to the rest of our body. Our heart never stop pumping as long as we are living. Once the heart stop pumping, the blood stop flowing, the cells of our body won't get the nutrition and oxygen which are carry by the blood. That's when we lost our life...
2007-03-21 14:04:26 · answer #2 · answered by Jc 2 · 0⤊ 0⤋
The heart pumps blood at high pressure. The blood vessels are close together in the blood stream, they effectively just push themselves, and are partially pushed along by the blood plasma's flow. When blood is pumped through, the area that it was in last gets a powerful suck, so it pulls blood through as well as pushing it.
2007-03-21 13:15:32 · answer #3 · answered by Captain Heinrich 3 · 0⤊ 0⤋
Because the heart pumps it around via the arteries and veins. Blood has many functions, but the most important is carrying oxygen to cells around your body. Cells need oxygen to live.
No heartbeat = no blood flow = no oxygen = DEAD.
2007-03-21 13:14:05 · answer #4 · answered by evrose 3 · 0⤊ 0⤋
because it is being "pumped" by your heart. The vessel walls also have the ability to constrict and open, facilitating circulation.
2007-03-21 13:15:02 · answer #5 · answered by rer348 4 · 0⤊ 0⤋
Becase the heart is pumping it... ??
2007-03-21 13:12:31 · answer #6 · answered by doggiemom 5 · 0⤊ 0⤋