The Musculoskeletal System Textbook pp. 221-228 Workbook pp.
133-136
Slide 2
The Musculoskeletal System The musculoskeletal system comprises
the bones, muscles and joints. It is the system that makes movement
possible. Without it, we would not be able to stand, walk, write or
even smile.
Slide 3
Bones Our bones make up the human skeleton. There are 206 bones
in the human body. Names of bones: p. 221 A bone is a hard solid
organ that forms part of the skeleton.
Slide 4
Types of Bone Spongy bone Compact bone
Slide 5
Parts of a Bone
Slide 6
Categories of Bones
Slide 7
Types of Bones
Slide 8
Functions of Bones Support Make up framework. Allow posture.
Support and anchor organs. Protection Protect internal organs (ex:
lungs, heart, brain). Movement Act as levers during muscle
movement. Storage Fat and minerals. Production of blood cells Bone
marrow produces formed elements in blood.
Slide 9
Structure of Joints
Slide 10
Mobility of Joints
Slide 11
Mechanics of Joints Flexion: decreases angle between 2 bones
Extension: increases angle between 2 bones Abduction: increases
distance between limb and bodys midline position Adduction:
decreases distance between limb and bodys midline position
Rotation: movement of bone around an axis
Slide 12
Mechanics of Joints
Slide 13
Mechanics of Joints: Rotation
Slide 14
Joints (Notes) A joint is a junction between two or more bones.
Joints make it possible to perform various movements, for example:
flexion, extension, abduction, adduction and rotation.
