Erythropoietic bone marrow in the pigeon: Development of its distribution and volume during growth and pneumatization of bones
- Institut fuer Anatomie und Zytobiologie der Justus-Liebig-Universitaet Giessen (Germany, F.R.)
During postnatal development of the pigeon, a large portion of the skeleton becomes pneumatized, displacing the hemopoietic bone marrow. The consequences of pneumatization on distribution and quantity of bone marrow as well as the availability of other sites for hemopoiesis have been investigated. Hemopoietic marrow of differently aged pigeons divided into five groups from 1 week posthatching (p.h.) up to 6 months p.h. was labeled with Fe-59 and examined by serial whole-body sections. Autoradiography and morphometry as well as scintillation counts of single bones and organs were also carried out. No sign of a reactivation of embryonic sites of erythropoiesis was found. Bone marrow weight and its proportion of whole-body weight increased during the first 4 weeks p.h. from 0.54% to 2.44% and decreased in the following months to about 1.0%. The developing bone marrow showed a progressive distribution during the first months of life, eventually being distributed proportionally over the entire skeleton, except for the skull. At the age of 6 months p.h. bone marrow had been displaced, its volume decreasing in correlation to increasing pneumaticity and conversion to fatty marrow. This generates the characteristic pattern of bone marrow distribution in adult pigeons, which shows hemopoietic bone marrow in ulna, radius, femur, tibiotarsus, scapula, furcula, and the caudal vertebrae.
- OSTI ID:
- 7025984
- Journal Information:
- Journal of Morphology; (USA), Vol. 203:1; ISSN 0362-2525
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BONE MARROW
TISSUE DISTRIBUTION
SKELETON
CELL DIFFERENTIATION
AUTORADIOGRAPHY
ERYTHROCYTES
HEMATOPOIETIC SYSTEM
IRON 59
MORPHOLOGY
PIGEONS
SCINTILLATION COUNTING
ANIMAL TISSUES
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BIRDS
BLOOD
BLOOD CELLS
BODY
BODY FLUIDS
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
MATERIALS
NUCLEI
ORGANS
RADIOISOTOPES
TISSUES
VERTEBRATES
550801* - Morphology- Tracer Techniques