When does the human body achieve its maximum amount of blood?

Question

To clarify - the body achieves 8-10 pints depending on size etc. But since a newborn babe cannot have such an amount, it suggests that as one grows older/larger the body creates more blood - so, when does the body decide it's created sufficient for the body's needs?

Answer 1

The body does decide on when it needs more blood but not in a sense where it thinks to itself "oooh I better make more blood today I think I am running out" Our bodies produce blood cells at a regular rate depending on diet and fluid intakes. When our bodies grow hormones are released which trigger increased rates of production in all cells which is also why we don't grow out of our skins. These hormones are the body deciding to do something and are triggered at certain point through-out our lives the most noticeable is puberty.

To answer the question when does the human body achieve its maximum amount of blood is tricky to say we basically have about 8-10 pints in an adult person old blood is reabsorbed into the body whilst new blood is produced so a sort of equilibrium is reached. I have also heard that we lose excess blood from the nose. Ever blow your nose and see small amounts of blood? Normally this excess would flow down the throat and go unnoticed, nose bleeds on the other hand are not the body getting rid of excess blood.

The reason the other guy had such a high heart rate after losing a large amount of blood was because his blood pressure would be severely reduced so the heart speeds up to try and counter that effect, adding fluids via a drip increases the pressure in the blood system and brings down the heart rate.

Answer 2

It doesn't- red blood cells only live for a few months so new ones are being created all the time. Blood volume varies and depends on factors such as water intake, electrolyte balance and physiological conditions. A couple of years ago I needed a drip after suffering severe dehydration and found I'd lost about a third of my blood volume. This gave me a pulse of 180 as I had less blood to pump round, and my pulse was brought back to normal after I'd had two litres of fluid.

The capacity of the cardiovascular system can also vary- exercise and muscle growth will stimulate the growth of new blood vessels and may widen existing ones, and inflammation and some other medical conditions cause new blood vessels to grow in a localised area.

Answer 3

for a female it would be during the seconded trimester of pregnancy.

Answer 4

you're only born with a certain amount of blood, cant create or take away blood [unless you get cut or seomthing or get a transfusion...]