Skeletal - functions, body systems & 3 types of joints
- Created by: mellis98
- Created on: 30-10-13 11:39
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- Skeletal system
- FUNCTIONS
- Protection
- ribs protect heart & lungs - cranium protects brain - vertebral column protects spinal cord, pelvic gridle protects abdomen
- Support
- holds vital organs in place
- Movement
- muscles pulls on bone
- wide range of movement - lots of joints
- Blood Production
- red & white blood cells produced in bone marrow
- white blood cells fight infection
- Shape
- needs a framework - allows to achieve good posture
- Protection
- JOINT TYPES
- FIXED (no movement)
- cranium
- SLIGHTLY MOVEABLE (pad of cartilage between them)
- between ribs & Sternum
- SYNOVIAL (freely moveable)
- allow variety of movement - e.g. hinge
- FIXED (no movement)
- BODY SYSTEMS
- JOINT CAPSULE
- outer sleeve preventing leackage of fluid
- SYNOVIAL MEMBRANE
- lines capsule & makes synovial fluid
- SYNOVIAL FLUID
- lubricates joint so bones move more easily
- HYALINE CARTILAGE
- covers ends of bones to stop knocking together
- LIGAMENTS
- holds bones together and keeps joints stable
- JOINT CAPSULE
- FUNCTIONS
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