SKELETAL SYSTEM.

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Presentation transcript:

SKELETAL SYSTEM

Functions of the Skeletal System Bones are made of OSSEOUS TISSUE Support and Protection Body movement Blood cell formation (bone marrow) - hematopoeisis Storage of inorganic materials                     (salt, calcium, potassium….)

About 206 bones 2 Main Divisions – Axial & Appendicular ORGANIZATION About 206 bones 2 Main Divisions – Axial & Appendicular

Axial Skeleton Head, neck, trunk Skull Hyoid Bone Vertebral Column Thoracic Cage (ribs, 12 pairs) Sternum

Hyoid Bone

Appendicular Skeleton Limbs & Bones that connect to the Pectoral Girdle (shoulders) Pelvic Girdle (hips)

BONE STRUCTURE - Long Bone Epiphysis Diaphysis Articular Cartilage Periosteum

Medullary Cavity – hollow chamber filled with bone marrow Inside the Long Bone Medullary Cavity – hollow chamber filled with bone marrow Red Marrow (blood) Yellow Marrow (fat) Endosteum – lining of the medullary

Compact (wall of the diaphysis) Types of Bone Tissue Compact (wall of the diaphysis) Spongy (cancellous, epiphysis) - red marrow

Structure of a Long Bone Figure 6.3a-c

* Assignment – Coloring of a Long Bone