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Lecture

Forensics 3FA3 lecture 3

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Department
Anthropology
Course
ANTHROP 3FA3
Professor
Andrew Wade
Semester
Winter

Description
04/01/2014 04/01/2014 Jan 14 2014 Intro to human skeleton gross structure of bone all of our bones are made up of 2 boney tissue 1- cortical or compact bone. Found in external surface gives bones its characteristics dense; few pores or spaces 2- cancellous bone (trabecular/ spongy bone) Made of networks Found on ends of long bones- arms and legs. Covered by thin later of cortical bone There are spaces in this bone Some may be found on the shaft Function of bone Support, for the tissues muscles and tendons…framework for structural support Protection for vital tissues and organs protecting different parts of the body Mineral reservoirs, bone is a tissue, it is living and has function reacting to internal and external stressors…calcium is one of the reservoirs bone can retain for us 04/01/2014 Production for red blood cells Movement, without our skeleton, our tendons, ligaments and muscles would not work, based on insertion etc. Axial and appendicular skeleton axial- skull, mandible, hyoid, vertebrae, ribs, sternum, sacrum forms the main midline axis of body. appendicular- shoulder, girdle, pelvic girdle, bones of arms and legs Axial Components the skull Cranium is made up of a huge number of bones with 22 individual bones, 6 bones plus hyoid, so technically 29…hyoid, speech bone rests in throats not directly attached to cranium cranial terminology distal means away from base skull- skeleton of head, with or without mandible cranium- skull without mandible- 2 units- vault- top part of skull, skull without facial bones Calvaria =is the upper part of the cranium and surrounds the cranial cavity containing the brain medical specimens- top half calotte= refers to the most superior and thickest portion of the skull, which may persist as a bony remnant of the skull for the longest time cranium 04/01/2014 22 bones plus 6 ear bones=28 mandible, skeletal support for lower jaw skull is round and oval cranial bone cross-section inner and outer layer of compact bone in between layer- layer of spongy bone-diploe –spongy bones of cranial vault- 8 bones frontal parietals -2 left and right occipital temporals- 2 (inferior to parietal) sphenoid- forms part of inside of skull- looks like a bat and cant be felt(ethmoid- not visible, it is located behind
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