Skeletal System
→ There are 206 bones in the body.
→ A baby is born with ~300 bones.
↳ Their bones are made up of flexible cartilage, hardens to bone and fuses together.
Red
Blood Cells.
FUNCTIONS:
→ Lymphocyte.
→ Protect and support the organs of the body and its internal structures.
Marrow. → Monocyte.
→ Allow movement. White → Eosinophil.
Blood Cells.
→ Basophil.
→ Give shape and structure to the body.
→ Neutrophil.
→ Produce blood cells.
Platelets.
→ Store calcium and phosphorus.
BONES:
→ Made from calcium-phosphorus, organic matter and water.
↳ They are covered in periosteum, a living membrane that houses osteoblasts, which contain bone forming cells.
↳ The centre of bone contains marrow, which consists of fat cells, blood vessels, and blood cell manufacturing tissue.
BONE SHAPES:
→ There are four types of bone shapes:
↳ Flat (e.g. ribs).
↳ Irregular (e.g. vertebrae).
↳ Short (e.g. carpals).
↳ Long (e.g. humerus).
SESAMOID BONE:
→ A bone embedded in a tendon.
→ Acts like a pulley to increase the efficacy of the tendon and protect tendons from wear and stress.
↳ Can result due to strain.
→ Located in hands, knees and feet.
→ Sesamoid injury.
↳ e.g. Patella (knee).
JOINTS:
→ Joints allow movement and are where two or more bones are held together by ligaments.
→ 3 types of joints:
↳ Fibrous (immovable) e.g. skull.
↳ Cartilaginous (slightly moveable) e.g. vertebrae.
↳ Synovial (freely moveable) e.g. ball & socket (hip), pivot (radius & ulna).
LIGAMENTS:
→ Plays a role in the stability of our joints.
↳ Connects bone to bone & gives your joints support.
→ Ligaments can be injured through over stretching or tearing and can make your joints less stable, leading to ongoing issues & injuries.
→ An overstretched ligament is called a ‘sprain’.
↳ The repair of ligaments take longer than a muscle due to poor blood supply.
↳ An overstretched ligament cannot return to its pre-injury length, therefore more likely to become injured again.
→ There are 206 bones in the body.
→ A baby is born with ~300 bones.
↳ Their bones are made up of flexible cartilage, hardens to bone and fuses together.
Red
Blood Cells.
FUNCTIONS:
→ Lymphocyte.
→ Protect and support the organs of the body and its internal structures.
Marrow. → Monocyte.
→ Allow movement. White → Eosinophil.
Blood Cells.
→ Basophil.
→ Give shape and structure to the body.
→ Neutrophil.
→ Produce blood cells.
Platelets.
→ Store calcium and phosphorus.
BONES:
→ Made from calcium-phosphorus, organic matter and water.
↳ They are covered in periosteum, a living membrane that houses osteoblasts, which contain bone forming cells.
↳ The centre of bone contains marrow, which consists of fat cells, blood vessels, and blood cell manufacturing tissue.
BONE SHAPES:
→ There are four types of bone shapes:
↳ Flat (e.g. ribs).
↳ Irregular (e.g. vertebrae).
↳ Short (e.g. carpals).
↳ Long (e.g. humerus).
SESAMOID BONE:
→ A bone embedded in a tendon.
→ Acts like a pulley to increase the efficacy of the tendon and protect tendons from wear and stress.
↳ Can result due to strain.
→ Located in hands, knees and feet.
→ Sesamoid injury.
↳ e.g. Patella (knee).
JOINTS:
→ Joints allow movement and are where two or more bones are held together by ligaments.
→ 3 types of joints:
↳ Fibrous (immovable) e.g. skull.
↳ Cartilaginous (slightly moveable) e.g. vertebrae.
↳ Synovial (freely moveable) e.g. ball & socket (hip), pivot (radius & ulna).
LIGAMENTS:
→ Plays a role in the stability of our joints.
↳ Connects bone to bone & gives your joints support.
→ Ligaments can be injured through over stretching or tearing and can make your joints less stable, leading to ongoing issues & injuries.
→ An overstretched ligament is called a ‘sprain’.
↳ The repair of ligaments take longer than a muscle due to poor blood supply.
↳ An overstretched ligament cannot return to its pre-injury length, therefore more likely to become injured again.
