Life Science 1.2 : The Skeletal SystemPresentation Transcript
Life Science : 1.2 The Skeletal System
Objectives: Identify the major organs of the skeletal system. Describe four functions of bones. Describe three types of joints. List three injuries and two diseases that affect bones and joints.
Bones Bones, cartilage, and the connective tissue that holds bones together make up your skeletal system. Bone Structure Bone tissue without any visible open spaces is called compact bone. Bone tissue that has many open spaces is called spongy bone. Bones contain a soft tissue called marrow. Bone Growth Most bones start out as a flexible tissue calledcartilage. Eventually, most cartilage is replaced by bone.
4 functions of Bones
Joints Joint Place where two or more bones meet. Joints are held together byligaments. Three Joints:
Skeletal System Injuries and Diseases Bones may be fractured or broken. Ligaments can be stretched or torn. Arthritis is a disease that causes the joints to swell or stiffen. Osteoporosis is a disease that causes bones to become less dense.