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Divisions of Skeletal System - Human Anatomy - Lecture Notes

Lecture Notes, Anatomy

Post: December 24th, 2012
Description
Divisions of Skeletal System, Axial Skeleton, Appendicular Skeleton, Types of Bones, Bone Surface Markings, Sphenoidal Sinuses, Alveolar Process with Alveoli, Features of Skull are some points f this lecture. This lecture handout was provided by lecturer in Human Anatomy class. Important terms are bold in this handout. Few terms of the lecture are given above.
Divisions of Skeletal System, Axial Skeleton, Appendicular Skeleton, Types of Bones, Bone Surface Markings, Sphenoidal Sinuses, Alveolar Process with Alveoli, Features of Skull are some points f this lecture. This lecture handout was provided by lecturer in Human Anatomy class. Important terms are bold in this handout. Few terms of the lecture are given above.
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Contents
A. Divisions of the Skeletal System 1. The 206 named bones in the adult skeleton are grouped in two major divisions i. axial skeleton consists of the 80 bones located around the longitudinal axis of the body: a. skull bones b. auditory ossicles c. hyoid bone d. vertebral column e. sternum f. ribs ii. appendicular skeleton consists of 126 bones that form: a. pectoral (shoulder) girdles b. upper extremities c. pelvic (hip) girdle d. lower extremities B. Types of Bones 1. Almost all bones are classified on the basis of shape into five major types: i. long bones ii. short bones iii. flat bones iv. irregular bones v. sesamoid bones, which are (typically) small bones embedded in tendons 2. There is one additional type of bone that is classified by location: i. sutural (or Wormian) bones, which are located in the joints between certain cranial bones C. Bone Surface Markings 1. The surfaces of bones have surface markings, structural features that are adapted to specific functions; the two majo..

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