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A&P Ch.8 Notes

by: Jamesia Arnold

A&P Ch.8 Notes BIOL 2010

Marketplace > U of M > Biology > BIOL 2010 > A P Ch 8 Notes
Jamesia Arnold
U of M
GPA 3.066

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Human Anatomy and Physiology I
Mr. Parris
Class Notes
Human Anatomy & Physiology
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This 2 page Class Notes was uploaded by Jamesia Arnold on Friday February 19, 2016. The Class Notes belongs to BIOL 2010 at U of M taught by Mr. Parris in Fall 2016. Since its upload, it has received 47 views. For similar materials see Human Anatomy and Physiology I in Biology at U of M.


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Date Created: 02/19/16
CH.8 Skeletal System: APPENDICULAR SKELETON  Appendicular skeleton’s primary function is movement. Human’s body has 2 pectoral (shoulder) girdles that attach the bones of upper limbs to the axial skeleton.  Both pectoral girdles consists of a clavicle & a scapula - Clavicle; anterior bone &manubrium of the articulates with the manubrium of the sternum at the sternoclavicular joint - Scapula: articulates with clavicle at acromioclavicular joint & with humerus at glenohumeral (shoulder) joint.  Each upper limp (upper extremity) has 30 bones in 3 locations --- humerus (arm): ulna & radius (forearm); 8 carpals in carpus (wrist); 5 metacarpus (palm), 14 phalanges (bones of digits) in hand. Humerus articulates proximally with scapula & distally with ulna & radius to form elbow joint. Ulna is located on the medial aspect of the forearm & is longer than the radius. “p. u” (pinky is on the ulna slide) Radius is the smaller bone of the forearm & is located on the lateral aspect (thumb) of the forearm. Carpus (wrist) is the proximal region of the hand & consists of 8 small bones, carpals, joined to one another by ligaments.  Articulation among carpal bones are called intercarpal joint.  Are arranged in two transverse rows of 4 bones each. -trapezium: 4 sided figure with no 2 sides parallel -trapezoid: 4 sided figure with 2 sides parallel - capitate: head shaped - hamate: hooked Metacarpus: intermediate region of the hand & consists of 5 bones called metacarpals Phalanges: bones of digits, make up distal part of the hand. - 14 phalanges in 5 digits of each hand joints be with phalanges are called interphalangeal joints. Pelvic Girdle (hip) consists of two hip bones called coxal or pelvic bones  Hip bones unite anteriorly at pubic symphysis  Unites posteriorly with sacrum at sacroiliac Development of skeletal system:  Most skeletal tissue arises from mesenchymal cells, connective tissue cells derived from mesoderm.  Much of the skull arise from ectoderm  Skull begins development during the fourth week after fertilization. It develops from mesenchyme around the developing brain& consists of two major portions: neurocranium & viscerocranium Neurocranium divides into 2 parts: Cartilaginous neurocranium Membranous neurocranium Viscerocranium divides into 2 parts: Viscerocranium Cartilaginous Viscerocranium Membranous


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