The Skeletal System
What is the purpose of a skeleton? 1. SUPPORTS the body and gives it shape. 2. PROTECTION of internal organs. 3. MOVEMENT of the body. 4. STORAGE of calcium and phosphorus. 5. PRODUCTION of red blood cells in the bone marrow.
TYPES OF SKELETONS Animals can have… NO SKELETON EXOSKELETON (external skeleton) ENDOSKELTON (internal skeleton)
MAJOR BONES OF THE HUMAN BODY
JOINTS – Areas of the body where two or more bones meet. CARTILAGE – Strong, flexible tissue found in joints. LIGAMENTS – Tissue connecting bone to bone. MUSCLE TENDON – Tissue connecting muscle to bone.
TYPES OF JOINTS Ball and Socket Joint: Joint with the widest range of motion. EXAMPLES: Hip and Shoulder
TYPES OF JOINTS Pivot Joint: Joint with a wide range of motion (the rotation of one bone around another). EXAMPLE: Neck
TYPES OF JOINTS Gliding Joint: Joint with a large range of motion (up/down and side/side). EXAMPLES: Ankle and Wrist
TYPES OF JOINTS Hinge Joint: Joint with limited motion (up/down). EXAMPLES: Knee and Elbow
TYPES OF JOINTS Fuse or Immoveable Joint: Joint with no range of motion. EXAMPLE: Cranium Fused Joints