Name the major site where $RBCs$ are formed.

Highest content of iron is found in

Choose the correct statements regarding human blood:
$I$. The volume of blood in an adult is $5 \; L$.
$II$. It constitutes $30-35 \; \%$ of the total extracellular fluid.
$III$. Glucose concentration in the blood is $50 \; mg / 100 \; mL$.
$IV$. Cholesterol concentration in the blood is less than $200 \; mg / 100 \; mL$.
$V$. Urea level in the blood is $10 \; mg / 100 \; mL$.
The option with correct statements is:

The liver does not synthesize which of the following proteins?

$A$ patient has type $A$ blood and needs a blood transfusion. Type $A$ blood is not available. Which of the following blood types could be substituted without causing harm to the patient?

$A -$ Fibrinogen is needed for the clotting of blood,and globulins are involved in defense mechanisms of the body.
$R -$ Factors for the coagulation of blood are present in the blood in an inactive form.