Which type of bone marrow is found in the medullary cavity of most adult long bones?

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Prepare for the ECPI Anatomy and Physiology AandP Exam 1. Utilize multiple choice questions and flashcards with detailed explanations. Enhance your knowledge and be exam-ready!

Multiple Choice

Which type of bone marrow is found in the medullary cavity of most adult long bones?

Explanation:
In adults, the medullary cavity of the long bone shafts is filled mainly with yellow bone marrow, which is adipose tissue that stores fat. As the skeleton ages, the red marrow that actively produces blood cells is gradually replaced in the diaphyses by this fatty yellow marrow. Red marrow remains in areas where hematopoiesis is still needed, such as the ends of long bones (epiphyses) and in certain flat bones, but the cavity of most adult long bones houses yellow marrow.

In adults, the medullary cavity of the long bone shafts is filled mainly with yellow bone marrow, which is adipose tissue that stores fat. As the skeleton ages, the red marrow that actively produces blood cells is gradually replaced in the diaphyses by this fatty yellow marrow. Red marrow remains in areas where hematopoiesis is still needed, such as the ends of long bones (epiphyses) and in certain flat bones, but the cavity of most adult long bones houses yellow marrow.

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