Osteons tube like structural units of the compact bone Concentric lamella rings

Osteons tube like structural units of the compact

This preview shows page 3 - 6 out of 10 pages.

Osteons: tube-like structural units of the compact bone Concentric lamella: ‘rings’ of bone that form the osteons Central canal: also called Haversian canal, they are tube-like openings in the osteons that contain blood vessels Transverse canals: tiny canals that connect between the central canals Osteocytes: living bone cells Lacunae: small spaces in the compact bone that house bone cells Canaliculi: tiny canals that connect the lacunae with each other and with the central canals Joints Where two bones meet is called an articulation or a joints Types of joints are: Synarthrotic (immovable) joints
Image of page 3
Amphiarthrotic (slightly moveable) joints Diarthrodial (freely movable) joints (most common) Cartilage is a cushion that provides protection for joints. Types of cartilage are: Hyaline: most common; moderate amount of collagen fibers; found in the trachea, nose, epiphyseal plate, articular surfaces of bones Elastic: contains both collagen and elastin fibers; more flexible than hyaline cartilage; found in ears and larynx Fibrous: mostly collagen fibers; tough; most often used to absorb shock; found between the vertebrae, pelvic girdle, knee, and shoulder Tendons attach muscles to bones. Ligaments connect bones to bones. Superficial fascia lies immediately under the skin Deep fascia is a dense, fibrous tissue that surrounds muscle bundles, nerves, and blood vessels Fascia provides strength to muscle tissues Bursae are small sacs of connective tissue lined with synovial membrane.
Image of page 4
Contains viscous synovial fluid Located at bony prominences or joints to relieve pressure and decrease friction between moving parts (e.g. patella, olecranon process) Functions of the Musculoskeletal System Support and protection: Sternum and rib cage protects the heart, lungs, kidneys, and liver Skull protects the brain Spine protects the spinal cord Voluntary body motion Bones provide a base for the muscles, tendons, and ligaments to attach for movement. Muscles are attached to bones with tendons. Muscles shorten when they contract and lengthen when they relax. This contraction and relaxation of muscles creates movement of the movable skeletal joints. Hematopoiesis and fat storage: Red bone marrow is inside some of the cavities of the bone. Red marrow produces erythrocytes, platelets, and most leukocytes.
Image of page 5
Image of page 6

You've reached the end of your free preview.

Want to read all 10 pages?

  • Spring '18
  • Bardsley
  • cancellous bone

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture