Question

what is the reason for low concentration of oxygen in capillaries

Answer 1

The oxygen carried within the red blood cells as Oxyhaemoglobin, at this point dissociates from the Haemoglobin and passes through the capillary wall into the muscle cells where it is 'picked up' by Myoglobin, the muscle cells equivalent to Haemoglobin. The Oxygen can now be used in aerobic metabolism to provide the muscle with energy.

The waste product produced during aerobic metabolism is Carbon Dioxide. Due to the lower concentration of Carbon dioxide in the capillaries than the muscle tissue (especially during high levels of metabolism) there is a surge through the capillary wall. From here the blood continues into venules and then veins which return the deoxygenated and CO2 rich blood back to the heart and then on to the lungs where the CO2 is exhaled and more Oxygen is taken up.

Answer 2

heya......

Most of the gas exchange in the body takes place in the capillaries. Oxygen diffuses from high concentration in the blood to lower concentrations in body cells.

The blood in the capillaries has very little oxygen and has a lot of carbon dioxide. ... where there is a large concentration to where there is a lower concentration.

tysm.......@kundan