Once the erythrocytes enter the blood in humans, it is estimated that they have an average lifetime of how many days.

Of the following, which mechanisms are important in the death of erythrocytes (pron: eh-rith-reh-sites) in human blood?

Surplus red blood cells, needed to meet an emergency, are MAINLY stored in what organ of the human body?

When a human donor gives a pint of blood, it usually requires how many weeks for the body RESERVE of red corpuscles to be replaced?

The several types of white blood cells are sometime collectively referred to as:

The condition in which there is a DECREASE in the number of white blood cells in humans is known as:

The smallest of the FORMED elements of the blood are the:

Which of the following statements concerning platelets is INCORRECT. Platelets:

When a wound occurs in humans, the platelets in the blood activate a substance which starts the clotting process. The substance which starts the clotting is:

When looking at the cross section of the human tibia, one finds the RED marrow in the:

Lengthening of long bones in humans occurs in a particular area of the bone. This area is called the:

The part of the human brain which is an important relay station for the sensory impulses and also is the origin of many of the involuntary acts of the eye such as the narrowing of the pupil in bright light is the: