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Ch 6 A&P 1

Osseous Tissue & Bone Structure

The study of bone structure and the treatment of bone disorders Osteology
Framework of bones, cartilages, ligaments.... Skeletal System
6 functions of skeletal system Support, protect, movement, mineral homeostasis, hemopoises, storage of fat
7 bone structures Epiphysis, Metaphysis, Diaphysis, Articular cartilage, Periosteum, Medullary cavity, Endosteum
Either end of a long bone Epiphysis
Growth plate along the top & bottom of a growing bone Metaphysis
Shaft/body of a long bone Diaphysis
Thin layer of cartilage covering epiphysis- reduces friction & absorbs shock Articular Cartilage
Protection around the outside of the bone Periosteum
The center part of the bone that stores fat Medullary cavity
Thin INNER lining around the Medullar Cavity Endosteum
Deposited in the Extracellular Matrix ( Hydroxyapatite) Mineral salt part of the bone
Hardness of bone Calcification
This can be determined by the amount of collagen fibers in the bone Flexibility
These break down bone to release minerals as needed ( break down bone in blood to let out calcium) Osteoclasts
3 types of bone cells Osteoblasts, Osteocytes, Osteoclasts
Young, immature bone building cells ( secrete matrix called osteoid) Osteoblasts
Mature bone cells that maintain hardened bone Osteocytes
Old & dried up bone cells, resorption of bone matrix to release calcium Osteoclasts
Inside part of bone that provides protection & support, dense along diaphysis & thin at epiphysis (outside of spongy bone) Compact bone
Inside part of bone that is lightweight & proves tissue support Spongy
This Makes up 80% of the skeleton- most common Compact bone
Structural units of bone Osteon
Contains artery & vein Central canal
Circular rings of matrix Concentric lamellae
Little lakes for osteocytes to live in Lacunae
Small channels (between lakes)- how osteocytes breathe/ eat/ connect Canaliculi
Makes up only 20% of skeleton, no osteons, always inside bone Spongy bone
"Little beams" thin columns of bone Trabeculae
Fills spaces between trabeculae in blood producing bones - kids Red Marrow
Feels spaces between trabeculae in all other bones Yellow Marrow (adipose tissue)
Up to one-third of bone mass can be lost in a few weeks of inactivity during Bone Degeneration
Allows bones to adapt to stress & heavily stressed bones become thicker & stronger from the effects of Exercise
Beginning between the ages of 30 & 40, the bones become thinner & weaker with age Osteopenia
Severe bone loss Osteoporosis
Shallow, basin like depression Fossa
Rounded articular projection Condyle
Raised area above a condyle Epicondyle
Bony expansion on a narrow neck Head
Large, blunt, irregular surface Trochanter
Rounded Projection Tuberosity
Any bony prominence Process
Narrow, prominent ridge of bone Crest
Narrow ridge of bone Line
Small pit like indent Fovea
Small rounded projection Tubercle
Arm-like bar of bone Ramus
Sharp, slender projection Spine
Round or oval opening through a bone Foramen
Narrow, slit-like opening Fissure
Canal-like passageway Meatus
Space within a bone Sinus
Created by: Cfelts0324