Compact bone is strong, compact, and located in between the periosteum and marrow cavity, typically in the cylindrical part of long bones.
Yellow bone marrow is primarily composed of fat, is inactive, and can be converted to red marrow if supplies are depleted.
Spongy bone has a sponge-like appearance due to its lattice structure. It typically is found at the end of long bones and contains red marrow.
Red bone marrow is composed of hematopoietic stem cells which are responsible for the generation of all blood cells in a process called hematopoiesis.
Long bones are typically found in the appendicular skeleton and have long cylindrical shafts with two dilated ends.
The epiphysis is the dilated end of long bones and has a spongy bone core inside the compact bone exterior.
The epiphyseal plate separates the epiphysis and diaphysis.
The diaphysis is the long, cylindrical shaft in the middle of the long bone. It has a marrow cavity within it containing marrow cells.
The metaphysis is the wider part of the long bone in between the epiphysis and diaphysis that grows during childhood.
The periosteum is a fibrous sheath surrounding the long bone that protects it and is the site for muscle attachment.
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