What is the endoskeleton?
- Provides internal support for the entire body
- Protects internal organs
What tissues does the skeletal system consist of?
- Bone marrow
- Bone membranes
- Tendons- muscle to bone
- Ligaments- bone to bone
Where is Red bone marrow found in the body?
- Infants- found in the medullary cavity of long bones and all areas of spongy bone
- Adults- found in the spongy bone of flat bones, and the head of the femur and humerous
What are they two types of bone?
- Cortical- strong, provides leverage for body movement, and structural support for organ's
- Cancellous- lacks strength and mineral density- spongy structure allows for flexibility and shock absorption against mechanical load.
Cancellous bone has an increased surface area, increased metabolic activatey and ca2+ ion exchange
- Long bone- contains compact bone and spongy bone.
- Short bone- contains mostly spongy bone
- Flat bone- contains thin layers of compact bone
- Irregular bone- e.g. coccyx
What cartilage is found in the skeletal system?
2 processes involved with ossification
- 1. Endochondrial ossification- cartilage to bone
- 2. Intramembraneous ossification- connective tissue- matrix- calcified bone
What is wolf's law?
- A bone grows or remodels in response to the forces or demands placed upon it.
- Is used in orthodontic treatment, when the bone is remodelled/remoulded by placing stress or pressure on the bone. the bone is resorbed by osteoclasts and the formation of bone from osteoblasts.
- Takes 3-4 months for new bone to reform and calcify.