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ch.6 Skeletal Sys

QuestionAnswer
Skeletal system made up of bones, cartilage, ligaments and tendons. has blood suppl and uses oxygen
Functions of the skeletal system Support, Protection, Movement, Storage, Blood cell formation
Support Framework supports the soft organs
Protection protects the body parts
Movement site for muscle attachment
Storage 99% Calcum, fat is stored
Blood Cell formation hematopolsis, red, white blood cells , platelets
2 types of bone tissue compact , spongy (cancellous)
3 types of cells in bone tissue Osteoblast, Osteoclast, Osteocytes
Osteoblast bone forming cell (makes new bone)
Osteoclast break down (resorb) bone
Osteocyte mature bone cells (stores calcium and phosphate)
Compact Bone Tissue basic functional unit OSTEON (haversian system)
Osten consist of a central canal (osteonic) surrounded by concentric rings (lamellae)
Ostenic central canals of Osten
Lamellae concentric rings
spongy bone is cancellous, light and less dense, consist of plates and bars of bone.
trabeculae plate of bone
Femur is an example of long
wrist is an example of short
ribs are an example of flat
osteogenesis to make bone
2 types of growth in bone development Intramembranous Ossification and Endochondral Ossification
Intramembranous Ossification cartilage cells cluster together to ake bone, this involves the replacement of sheetlike connective tissue membranes with bony tissue THIS IS HOW FLAT BONES ARE FORMED
Endochondral Ossification involves the replacemnt of hyaline cartilage, this is the way most bones are formed
2 TYPES OF DIVISION OF THE SKELETON Axial Skeleton, Appendicular Skeleton
Axial Skeleton 80 bones forms rhe vertical axis of the body
Appendicular Skeleton 126 bones includes free appendages, it attaches to the axial skeleton
How many bones are in the Axial Skeleton 28: 8 Cranium, 14 Face, 6 Auditory ossicles
sutures bones in the skull are tightly interlocked by irregular lines
sinuses air-filled cavities that are lined with mucus membranes
foramina opening: in skull bones that allow passage of blood vessels and nerves
Articulation Joints where two bones come together
3 types of articulation immovable (sutures in the skull) slightly movable (ribs to sternum) freely movable (knee)
Created by: AshleyRenay
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