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Fine structure of the bone marrow of the chicken and pigeon
Author(s) -
Campbell Ferrell
Publication year - 1967
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051230407
Subject(s) - golgi apparatus , biology , electron microscope , granule (geology) , vesicle , lumen (anatomy) , bone marrow , eosinophil , medullary cavity , pathology , ultrastructure , anatomy , basement membrane , biophysics , microbiology and biotechnology , membrane , endoplasmic reticulum , immunology , medicine , paleontology , physics , genetics , asthma , optics
The structure of bone marrow from chickens and pigeons was studied with light and electron microscopy. Erythropoiesis occurs in the lumen of the medullary sinuses. Immature erythroid cells appear to adhere to the sinus wall and may thus be prevented from entering the peripheral circulation. The wall of the medullary sinuses is formed by elongated lining cells, lacking a basement membrane, which are continous except at sites where blood cells are passing through them. When viewed with the electron microscope, developing heterophil myelocytes, which occur only in the extravascular spaces, possess two populations of granules; one type is globular in content, the other is fibrillar in content. The globular type predominates during all stages of development and appears to be the specific granule. Specific granules originate from material which is formed in the Golgi complex, pinches off, and accumulates in expanded vesicles. The origin of the material in the fibrillar granules was not determined. Like the globular granules of heterophil leucocytes, granules of eosinophil leucocytes arise from material which is formed in the Golgi complex.