Although blood is a fluid, nearly half its volume is composed of cells. The most numerous cells are . The remainder of the cells are _ , which help the body defend itself against foreign particles and microorganisms.
A)platelets : leukocytes
B)erythrocytes : leukocytes
C)leukocytes : erythrocytes
D)erythrocytes : platelets

Question

Quizplus · Accepted Answer

Erythrocytes, or red blood cells, are the most numerous cells in the blood. Leukocytes, or white blood cells, help defend the body against foreign particles and microorganisms.

Although Blood Is a Fluid, Nearly Half Its Volume Is