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Related Experiment Videos

Medullary bone of piglets.

A Shimada1, Y Asada, R Oura

  • 1Department of Veterinary Pathology, Faculty of Agriculture, Tottori University, Japan.

The Journal of Veterinary Medical Science
|December 1, 1991
PubMed
Summary

Medullary bone in piglets fills bone marrow cavities at birth but decreases with age. This bone remodeling, involving osteoclasts, may influence hematopoiesis and piglet anemia.

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Area of Science:

  • Veterinary Anatomy
  • Developmental Biology
  • Hematology

Background:

  • Bone marrow in mammalian long bones is typically in the medullary cavity at birth.
  • The presence and changes of osseous tissue in piglet medullary cavities post-birth were investigated.

Purpose of the Study:

  • To examine the persistence and age-related changes of medullary bone in piglets.
  • To understand the relationship between medullary bone, extramedullary hematopoiesis, and piglet anemia.

Main Methods:

  • Histological examination of piglet long bones at and after birth.
  • Observation of osteoclast activity and medullary bone changes with age.
  • Assessment of extramedullary hematopoiesis in liver and spleen.

Main Results:

  • Medullary cavities were filled with spongy bone immediately after birth, decreasing significantly by 90 days.
  • Osteoclast size and number increased significantly during medullary bone resorption (p < 0.05).
  • Extramedullary hematopoiesis was active in young piglets, potentially compensating for narrowed medullary cavities.

Conclusions:

  • Medullary bone in piglets undergoes significant resorption with age, leading to an enlarged medullary cavity.
  • The interplay between medullary bone and extramedullary hematopoiesis may be crucial in understanding piglet anemia.

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