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Skeletal System

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by

Joel Hutson

on 12 October 2016

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Transcript of Skeletal System

by Joel David Hutson
College of Lake County

Skeletal System
Summary
Bone
Anatomy

Appendicular
Skeleton

Axial
Skeleton

i. bones help support your
body internally against gravity & provide
internal protection from mechanical
injury
ii. bones are alive;
they grow & shrink
& are major resevoirs
of calcium & blood
stem cells
iii. the axial skeleton protects
our central nervous system & forms
a beam that supports body weight
iv. the appendicular skeleton
supports our body weight & provides the anchoring points for muscles to move our body
Course Learning Objectives
& Outcomes:

A.Describe the various organ systems within the human body & explain their basic functions.
B.Identify the major bones of the skeletal system, describe the internal structure of a long bone, & explain the functional & structural classification of skeletal articulations.
Course Learning Objectives
& Outcomes:

A.Describe the various organ systems within the human body & explain their basic functions.
B.Identify the major bones of the skeletal system, describe the internal structure of a long bone, & explain the functional & structural classification of skeletal articulations.
Joint Type:

Symphysis/syndesmosis=
immobile joint.
sagittal suture
Joint Types:

Diarthrosis = highly mobile joint (e.g., shoulder & hip)
Amphiarthrosis = slightly mobile joint (e.g., metacarpals in palm)
Synarthrosis/syndesmosis/symphysis = highly immobile joint (e.g., skull sutures)
Foramen rotundum
Foramen spinosum
Foramen lacerum
Carotid canal
Hypoglossal canal
, on average
, or cancellous bone
(i.e., cranial bones)
(has stem cell layer)
perichondrium
(cartilaginous
precursor to
periosteum)
endosteum
(deep equivalent
to periosteum)
(or metaphysis)
(Compact)
Spongy/Cancellous Bone
- composed of wandering osteons
without collagen/hydroxyapatite
filling in the gaps between them
- very strong under compression
(lamellae/layers of collagen/hydroxyapatite
Concentric
lamellae
Osteoprogenitors - stem cells for osteoblasts

linea aspera
Full transcript