why is it necessary for the blood to carry oxygen to our body and cells?

Answer 1

The human body requires oxygen (brought about bound to the hemoglobin molecules by the red cells in the blood) to perform aerobic respiration.

Aerobic respiration is the process by which an organism obtains energy by reacting oxygen with glucose to give water, carbon dioxide and ATP (energy). Respiration takes place in the mitochondria membrane complex of eukaryotes and on the cell membrane of prokaryotes and provides the cells with energy. It is the preferred method of pyruvate breakdown from glycolysis and requires that pyruvate enter the mitochondrion to be fully oxidized by the Krebs cycle. The product of this process is energy in the form of ATP (Adenosine Triphosphate), by substrate-level phosphorylation, NADH and FADH2.

Answer 2

The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins. As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxygen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles. On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide (a waste product) is removed from the blood and replace with fresh oxygen that we have inhaled through the lungs.

Answer 3

You require blood to carry oxygen to cells so that a process called respiration can occur. In cells the oxygen reacts with glucose (obtained from food) to produce water, energy and carbon dioxide.....and you need energy for your body to carry out any process within the body!!
hope that helps

Answer 4

It's the way the cells access energy using oxygen and glucose.
However there seems no reason why cells in anoxic conditions should just commit suicide. Lack of oxygen should just 'shut down' the cell, ready for 're-awakening' when oxygen is restored.
Unfortunately, and no doubt conveniently for cancer producing conditions, the cell undergoes self- destruction, which in the case of neurons takes place in minutes, causing irreversible brain damage. Need to inhibit the release of neurotransmitters by means of a depressant (alcohol?) to prevent cell necrosis.. The process might also involve the temporary incapacitation of the mitochondria in the cell cytoplasm which continue to abreact once the O2 is turned on again.

Answer 5

When you breath in the air ( contains about 20% oxygen) goes into your lungs.

But all your cells including those in in your skin (e.g feet) need oxygen to respire.

respiration is how our cells get the energy they need to repair grow and copy themselves from oxygen and sugar.

oxygen + glucose > carbon dioxide + water + energy

The only way you cells can get this oxygen is from the lungs. So the blood picks up oxygen from the lung and carries to your cells as with out the oxygen your cells will die.

Answer 6

All living cells need oxygen for respiration. The equation for respiration is: Oxygen+Glucose -> Energy+Carbon dioxide+Water. The more work the cells are doing the more oxygen they would need.

Answer 7

Many (but not all) metabolic reactions and chemical processes in our body require energy. They get this energy by using and changing fats and sugars etc in our body. To do this the chemical reaction (called oxidising) needs oxygen, hence the need to transport it absolutely all over the body.

Answer 8

Without oxygenation of our cells our bodies would die

Answer 9

Oxyhen is needed for respiration which occurs in every cell in your body and produces energy for cellular reactions to take place. Basically, it makes you work!

Answer 10

Cells run on oxygen so they would die otherwise