Skeletal System Flashcards
Label the skeletal system
- Cranium
- Scapula
- Clavicle
- Ribs
- Radius
- Pelvis
- Ulna
- Phalanges - Metacarpals - Carpals
- Femur
- Patella
- Tibia
- Fibula
- Talus/ Tarsals
- Metatarsals
- Phalanges
State the 4 functions of the skeletal system
- Shape and support
- Movement
- Protection of vital organs
- Red blood cell production
Explain and give an example of how the skeletal system provides shape and support
How? - Skeleton provides shape and support for the body. It forms a frame for which our muscles can attach and in which our organs can sit.
Example - The vertebrae enables us to stay upright.
Explain and give an example of how the skeletal system allows for movement
How? - Muscles are attached to skeleton via tendons. Movement occurs when muscles contract and pull on bones which makes them move about a joint.
Example - The bicep connects the shoulder and elbow and helps with flexion.
Explain and give an example of how the skeletal system provides protection for vital organs
How? - Internal organs are soft, delicate and easily damaged. These vital organs are protected by the skeleton.
Example - The cranium protects the brain. The ribs protect the heart and the lungs.
Explain and give an example of how the skeletal system produces red blood cells
How? - The centre of some large bones contains bone marrow, which creates red blood cells.
Example - The pelvis and femur are both important in blood production.
State the 4 types of bones
- Long
- Short
- Flat
- Irregular
State the function and give an example of long bones
Function - Act as levers to produce a large range of movement.
Examples - Femur, tibia, fibula, humerus, ulna, radius, phalanges, clavicle
State the function and give an example of short bones
Function - Short bones are approximately as wide as they are long. Their function is to provide stability and support, with little movement.
Example - Carpals, tarsals
State the function and give an example of flat bones
Function - Provide a large surface area for muscles to attach to. They provide protection for organs.
Example - Pelvis, cranium, scapula
State the function and give an example of irregular bones
Function - These bones provide protection and support. They are shaped to suit the specific job they have to do.
Example - Vertebrae
Describe and give an example of a fixed/ immovable joint
Description - These bones cannot move at all and are found in the cranium. Also known as fibrous joints as the joints are connected via fibrous connective tissue.
Example - Cranium
Describe and give an example of a slightly moveable joint (cartilaginous joint)
Description - These joints can move a small amount as they are linked together by ligaments and cartilage.
Example - Vertebral column and ribs
Describe and give an example of a freely moveable joint (synovial joint)
Description - These joints have a large amount of movement and include a large number of parts.
Example - Elbow, knee, hip, shoulder
State an describe the parts that make up a synovial joint (6 parts)
- Synovial membrane - surrounds the joint capsule with synovial fluid.
- Synovial fluid - Acts as a lubricant that reduces friction in the joint; allows for smoother movement and reduces wear and tear.
- Joint capsule - Structure that surrounds and protects the joint, holding the bones together. Made up of an outer fibrous membrane and an inner synovial membrane.
- Ligament - Strong, elastic fibres that hold bones together and keep them in place.
- Cartilage - Strong but flexible material found at the end of the bones that acts as a cushion to stop bones knocking each other.
- Tendon - A tough band of fibrous tissue that connects muscle to bone and enables joints to withstand tension.