*Functions of the Skeletal System ( remember at least 3 )
1. A rigid framework to give shape to the body
2. Supports and protects softer structure in the body
3. Individual bones serve as levers for muscles to provide movement
4. Storage sites for minerals such as calcium and phosphorous. Lipids are stored in yellow bone marrow
5. Blood cells are produced in red bone marrow
Skeletal System
- Consists of 206 bones
- Bind by ligaments to form joints
Formation of Bone
Embryo --> Flexible cartilage + Fibrous membrane --> Ossification ( laying down of calcium ) --> Bone
Ossification
- Process of bone formation by conversion of cartilage and fibrous membrane into bone
- By bone building cells known as osteoblasts
- Growth & development of long bone occur in 3 stages :
1. Embryo
2. Fetus
3. Child and adolescence
- *2 types of cells for bone formation :
*1. Osteoblasts >
- Cells that produce bone
- Remove calcium and phosphorous from the blood stream
*2. Osteoclasts >
- Cells that breakdown bone during bone remodeling
- Periods of bone growth and repair of bone tissues
Factors influencing the growth of bone
1. Dietary factors
2. Hormonal factors
3. Physical factors
Dietary factors
*1. Calcium
- Maintain framework and hardness of bone
*2. Vitamin D
- Absorption and use of calcium and phosphorous
3. Vitamin C
- Production of intercullular substance
Hormonal factors
- Endocrine glands play a very important role in promoting and inhibiting growth of bone
*1. Pituitary gland > Produce growth hormones
2. Thyroid gland > Produce calcitonin ( Activates the calcium )
3. Parathyroid gland > Produce parathormone
Oops! This image does not follow our content guidelines. To continue publishing, please remove it or upload a different image.
YOU ARE READING
Biology Science 1
RandomThis is just my Biology notes for my studies in school. It might benefit you. If you have any questions or doubts, do comment down! Thank you!
