Blood Histology

Erythrocytes: Red blood cells. Do not have a nucleus or organelles Erythrocytes: Red blood cells. Do not have a nucleus or organelles. Filled with hemoglobin. Platelets: fragments of a larger cell, the megakaryocyte, that act in blood clot formation. erythrocyte platelets

Neutrophil- granulocyte Polymorphonuclear: nucleus has many lobes separated by threads of chromatin. Most abundant in blood, phagocytic & mobile

Eosinophil- granulocyte Granules stain pink or orange (from the stain eosin) Bi-lobed nucleus Anti-parasite

Basophil- granulocyte Dark blue staining cell. Cytoplasm filled with granules. Nucleus has 2 lobes but hard to make out most of the time due to dark staining granules

Monocyte- agranulocyte Kidney-bean shaped nucleus, usually contains a “notch”. Highly phagocytic. A lot of cytoplasm present.

Lymphocyte-agranulocyte T or B cell. Part of body’s specific defenses. Large, round, dark staining nucleus- takes up the majority of the cell. Very little cytoplasm visible around periphery.

quiz: what parts of blood can you see here?

Answer: platelet erythrocytes neutrophil lymphocyte erythrocytes eosinophil

Quiz yourself

A neutrophils B eosinophil C basophil D neutrophil E eosinophil F plasma cell (omit) G lymphocyte H lymphcyte I lymphocyte J monocyte K monocyte L monocyte

Know three tunics & how to tell apart an artery, vein & nerve

Artery, vein, nerve vaso vasorum