7.2 Flashcards
(5 cards)
What is the difference between a Haversian canal and a Volkmann’s canal?
Haversian canals are part of the compact bone system, running lengthwise and consisting of concentric layers of ossified bone around a central canal that contains blood, lymph, and nerve supply for osteocytes.
Volkmann’s canals are channels that carry blood vessels perpendicular to the bone’s long axis, connecting with the Haversian canals to supply nutrients to osteocytes.
By which mechanism of bone formation do most bones in the animal body develop before birth, and how does the process take place?
Most bones develop through endochondral method, where a cartilage template is formed first and later replaced by bone. In the fetus, bones begin as cartilage rods that serve as prototypes for the final bones.
What is the difference between the primary growth center of a bone and a secondary growth center?
In long bones, the primary growth center is a location in the shaft (diaphysis) where bone development begins. Additional growth centers called secondary growth centers develop in the ends (epiphyses) of the bone.
Where would you find an epiphyseal plate, and what would you find it doing?
Epiphyseal plates (growth plates) are cartilage regions between the diaphysis and epiphyses of long bones. They allow bones to lengthen as the animal grows by creating new bone.
What is bone marrow, and what is the difference between the red kind and the yellow kind?
Bone marrow fills spaces in bones. Red bone marrow forms blood cells and is more common in young animals, while yellow bone marrow, made mostly of fat, is found in adults and does not produce blood cells but can revert to red marrow if needed.
