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ELAINE N. MARIEB
EIGHTH EDITION
5
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
PowerPoint® Lecture Slide Presentation by Jerry L. Cook, Sam Houston University
ESSENTIALSOF HUMAN
ANATOMY& PHYSIOLOGY
PART A
The Skeletal System
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Objective 1
Identify the subdivisions of the skeleton as axial or appendicular
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Skeletal System Parts of the skeletal system
Bones (skeleton)
Joints – point of movement
Cartilages – protection
Ligaments – connect bone to bone
Divided into two divisions
1. Axial skeleton
2. Appendicular skeleton
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Axial Skeleton Forms the longitudinal, central part of the
body
Divided into three parts
1. Skull
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Skull
Figure 5.7
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Axial Skeleton Forms the longitudinal, central part of the
body
Divided into three parts
1. Skull
2. Vertebral column
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Vertebral Column Vertebrae separated
by intervertebral discs
The spine has a normal curvature
Each vertebrae is given a name according to its location
Figure 5.14
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Axial Skeleton Forms the longitudinal, central part of the
body
Divided into three parts
1. Skull
2. Vertebral column
3. Bony thorax
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Bony Thorax Forms a cage
to protect major organs
Made-up of three parts
Sternum
Ribs
Thoracic vertebrae
Figure 5.19a
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Appendicular Skeleton1. Limbs (appendages) – all arm and leg
bones
2. Pectoral girdle
Clavicle, scapula
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Bones of the Shoulder Girdle
Figure 5.20a–b
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Appendicular Skeleton1. Limbs (appendages) – all arm and leg
bones
2. Pectoral girdle
Clavicle, scapula
3. Pelvic girdle
Ilium, ishium, pubic bone
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
The Pelvis
Figure 5.23a
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Objective 2
List 5 functions of bones.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Functions of Bones1. Protection of soft organs (ribs/lungs &
Heart, skull/brain)
2. Support of the body (keeps us up)
3. Movement due to attached skeletal muscles and levers (joints)
4. Storage of minerals (calcium and phosphorus) and fats
5. Blood cell formation …in the marrow (center) of long bones