Histology Guide virtual histology laboratory

Chapter 7 - Peripheral Blood

Blood is a fluid connective tissue composed of formed elements (red blood cells, white blood cells, and platelets) circulating in a fluid called plasma. It provides a mechanism by which gases, nutrients, wastes, and cells can be transported throughout the body.

Special stains are used to differentiate the types of blood cells. Wright's stain, a mixture of eosin Y (acidic) and methylene blue (basic) dyes, is superior in this regard to hematoxylin and eosin (H&E).

Blood

Composition of human blood:

Composition of leukocytes:

Blood Smear

The histology of blood cells is studied in smears prepared by spreading a drop of blood into a thin layer on a microscope slide.

slide

MH 033 Blood Smear

(Wright's stain)

Blood Cells

Blood cells are examined using a single, high-resolution 60x scan acquired from the zone of best morphology of this blood smear.

Identify the different types of blood cells by distinguishing characteristics such as nuclear morphology, presence and appearance of granules, size, and shape,.

slide

MH 033hr Blood Smear

(Wright's stain)

Review

This diagram allows the morphology and staining characteristics of different cell types to be compared.

slide

MH 033hr Blood Smear

(Wright's stain)

This review shows all of the blood cells identified in the previous slides.

slide

MH 033hr Blood Smear (review)

(Wright's stain)