Skeletal System Flashcards
Functions of skeletal system
- support
- Protection
- Movement
- Mineral storage
- Blood cell formation
Framework that supports body and cradles its soft organs
Support
Protects internal organs and fragile body parts: heart, lungs, brain, lungs, spinal cord, etc.
Protection
bones act as levers for muscles
movement
bones acts as a storage for Calcium and Phosphate
Mineral storage
is the blood cell production process
“hematopoiesis”
2 Regions of long bone
- Diaphysis
- epiphysis
*Shaft
* Composed of compact bone
Diaphysis
*Ends of the bone
* Composed mostly of spongy bone
Epiphysis
Bone cells that aids in remodelling
- Osteoblast
- Osteocyte
- Osteoclast
the bone cell that buids a new bone
Osteoblast
the mature bone cell
Osteocyte
the bone cell that eats bone
disslve and break down old or damaged bone cells
Osteoclasts
Changes in the human skeleton
- Embryos: primary hylaine cartilage
- During development: much of this cartilage is replaced by bone
In embryos, the skeleton is ___ ___ ___
primarily hyaline cartilage
During the development, what happens to the cartilage?
Much of it is replaced by bone
Where does cartilage remain?
Isolated areas like;
- Bridge of nose
- Parts of ribs
- Joints
by definition, it is the process of bone formation
(Bone) ossification
Types of Bone Ossificiation
- Endrochondral ossification
- Intramembranous ossification
cartilage to bone
(Process by which growing cartilage is replaced by bone to form growing skeleton)
Endochondral ossification
bony structure between the epiphysis and diaphysis)
Epipyseal plate
4 regions of epiphyseal plate
- “resting” cartilage cells
- Zone of proliferation
- zone of hypertrophy
- zone of calcification
*Membranous tissue to bone
*In flat bones of the skull
Intramembranous ossification