Osteology

Unlike other connective tissues it lacks nerves and blood vessels. This results in decreased tissue healing.

Cartilage Cells

bind to water to make cartilage rubbery.  (trap water with in cartilage)

• Collagen
• Elastic

Watery substance between the fibers

• Hyaline Cartilage
• Fibrocartilage
• Elastic Cartilage

• Smooth, strong, rigid (hard), glass like
• most common cartilage in the body
• reduces friction (in between the bones)
• This makes up the cartilage at movable joints

• Acts as a shock absorber
• has strength to resist compression and tension

• Flexible
• found in the eternal ear and epiglottis

• Os=Bone
• Study of bone

• Strength to resist tension
• Forces that pull
• Collagen
• Strength to resist compression
• Forces that push
• Ability to remodel or change
• Bone "construction worker" cells

forces that pull

forces that push

Bone 'Construction worker' cells

• Builders
• bone forming or depositing cells

• supervisors
• bone regulating or monitoring cell

• cutters
• cell responsible for breaking down or resorbing bone

• Fibers
• Collagen-gives bone its tensile strength
• proteins

• Interfibrillar (ground) substance
• Hydroxyapatite-the hard stuff of bone
• bone salts

• Fibers
• interfibrillar

• organiccomponents
• proteins

• inorganic components
• Bone salts

• Gives bone its compressive strength
• between fibers

• microscopically porous
• external layer
• dense and vascular

structural unit of compact bone

• macrosopically porous
• internal layer
• vascular and spongy
• filled with bone marrow

• "little beams"
• structural units of spongy bones

206 individual bones come in a variety of size and shapes

• long
• short
• flat
• irregular

greatest length in one dimension

cube like bones

platelike bones

complex shapes that do not fit in any of the above categories

• wrap around the outside bone
• double layered membrane of dense irregular CT
• really strong in all directions

• at the ends of bone
• made of hyaline cartilage
• lacks nerves and blood vessels
• reduces friction between bone ends

• tubal shaft
• flared ends are the epiphysis

• hollow center with in bone of the diaphysis
• filled with bone marrow
• yellow bone marrow for adult
• red bone marrow for child

• passage way for blood vessels into the medullary cavity
• into and out of the bone

articular cartilage and periosteum

• Support
• Movement
• Protection
• Calcium (ca2+) homeostasis
• blood-cell formation
• energy storage

red bone marrow

yellow bone marrow