Skeletal System

Why the same photo as tissues?

Skeletal System – Lecture Plan

• Tissues and organs of the skeletal system
• Microanatomy of osseous tissue
• Bone development
• Physiology of osseous tissue
• Bone disorders

Functions of the Skeleton

• Support
• Bones support the body, limbs, viscera
• Protection
• Of brain, spinal cord, viscera
• Movement
• Muscles attach to bones across joints, contraction allows for movement
• Electrolyte Balance
• Reservoirs for Ca⁺⁺ and PO₄^-
• Acid-Base Balance
• Buffers against large pH changes by influencing [HCO₃^-] and [PO₄^-]
• Hematopoiesis
• RBC and WBC formation occurs in marrow
• Energy Storage

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Bone as a Tissue

• Dynamic!
• Osseus connective tissue with mineralized matrix
• Calcification/Mineralization
• Deposition of Ca⁺⁺ salts
• Normal part of ossification, but just the beginning
• Ossification
• Formation of new bone tissue
• Includes both Ca⁺⁺ and collagen deposition

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