Dec 18, 1975

EMMA-4 analysis of iron in cells of the thymic cortex of a weaver-bird (Quelea quelea)

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
M D Kendall


Combined morphological and analytical studies with the EMMA-4 analytical electron microscope have enabled very early erythroid cells to be identified within the cortex of enlarging thymic lobes of Quelea quelea. These early erythroid cells have pale cytoplasm (sometimes with ferritin-like crystals present), slightly pachychromatic nuclei and have fewer cell organelles (mitochondria) than lymphocytes. Counts for iron were approximately 70% lower than counts from mature erythrocytes found free in the cortex. Iron was also recorded from some epithelial reticular cells and pyknotic nuclei; no iron was recorded from small lymphocytes (thymocytes) in the cortex. The presence of very early erythroid cells is a further indication that erythropoiesis occurs in situ in the avian thymus.

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Mentioned in this Paper

Crystal - Body Material
Cortex Bone Disorders
Adrenal Cortex Diseases
Mature Erythrocytes
Quelea quelea
Erythroid Cells
Structure of Thymic Cortex
Lymphocytes as Percentage of Blood Leukocytes (Lab Test)
Neoplasm of Uncertain or Unknown Behavior of Thymus

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