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Which of the following terms refers to the fatty, blood-forming tissue in the cavities of long bones?

A. Marrow
B. Lacuna
C. Cortex
D. Matrix
E. Periosteum


Sagot :

Final answer:

Bone marrow is the fatty, blood-forming tissue in long bones, with red marrow crucial for blood cell production. Periosteum serves as a protective covering for bones and aids in bone cell generation.


Explanation:

The fatty, blood-forming tissue in the cavities of long bones is called bone marrow. There are two types of bone marrow: yellow marrow, mainly composed of fat, and red marrow, where hematopoiesis occurs, producing blood cells.

Red bone marrow is found in locations like the femur, ribs, vertebrae, and pelvic bones, containing hematopoietic stem cells.

Periosteum is a protective fibrous membrane covering the outer surface of bones, contributing to bone cell production as well.


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