What does the hematocrit value indicate?

The salt concentration in human blood is approximately:

$A$: Yellow bone marrow is reserve erythropoietic tissue.
$R$: After severe bleeding,yellow marrow may convert to red marrow.

$A$ blood test of a person suspected of having anemia shows large,immature,nucleated,hemoglobin-deficient erythrocytes. Which of the following substances should be included in their diet to alleviate these symptoms?

The disease resulting from prolonged clotting time due to the lack of plasma thromboplastin component $(PTC)$,which is necessary for the formation of thromboplastin,is:

The medium of plasma is