Question

if hemoglobin is not present in body how much time to take oxygen to reach from lungs to our toes ?

Answer 1

A red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a haem group. so it take some time

Answer 2

It is not possible RBC to function without

haemoglobin.

During formation, the RBC

eventually loses its nucleus and

leaves the bone marrow as a

reticulocyte. At this point, the

reticulocyte contains some

remnants of organelles. Eventually

these organelles leave the cell and

a mature erythrocyte is formed.

RBCs last an average of 120 days

in the bloodstream. When RBCs

age, they are removed by

macrophages in the liver and

spleen.

A hormone called erythropoietin

and low oxygen levels regulate the

production of RBCs. Any factor

that decreases the oxygen level in

the body, such as lung disease or

anemia (low number of RBCs),

increases the level of

erythropoietin in the body.

Erythropoietin then stimulates

production of RBCs by stimulating

the stem cells to produce more

RBCs and increasing how quickly

they mature. Ninety percent of

erythropoietin is made in the

kidneys . When both kidneys are

removed, or when kidney failure

is present, that person becomes

anemic due to lack of

erythropoietin. Iron, vitamin B-12

and folate are essential in the

production of RBCs.