Skeletal SystemBiology

What do you know?

• Take a look at the handout of the skeleton without labels (put your name on the top).• Label as many bones as you currently

know.• *This will not be graded for accuracy, but

fill in as many as you can, turn it in to the front tray, and this will give Ms. Graf and you an idea of what you know right now before we study the skeletal system.

The Skeletal System: Structures

• Key Structures:• 1. Bones – hard connective tissue that supports

the body• 2. Cartilage – connective tissue that supports the

body, softer and more flexible than bone.• 3. Ligaments – strip of tough connective tissue in

a joint that holds bones together• 4. Tendons – tough connective tissue that joins

muscle to bone

The Skeletal System: Functions

• Functions of bones:• 1. Support – internal framework that supports and anchors all

organs.• Example: ___________________________________________

• 2. Protection – protect soft body organs• 3. Movement – muscles use bones as levers to move the body• Example:_____________________________________________

• 4. Storage• A. Internal cavities of bone store fat• B. Bones store minerals: Calcium, phosphorous

• 5. Blood cell formation – blood cells are formed in marrow cavities of some bones

Classification of Bones• 206 bones total in the adult human body• Types of Bone• 1. Compact • 2. Spongy • 3. Long • 4. Flat• 5. Irregular

Classification of Bones• 206 bones total in the adult human body• Types of Bone• 1. Compact • A. dense and looks smooth• B. Example:______________________________

Classification of Bones• 206 bones total in the adult human body• Types of Bone• 1. Compact • 2. Spongy • A. Composed of small needlelike pieces and lots of open space• B. Example:_______________________________

http://www.gla.ac.uk/ibls/US/fab/tutorial/generic/bone2.html

Classification of Bones• 206 bones total in the adult

human body• Types of Bone• 1. Compact • 2. Spongy • 3. Long • A. Longer than they are wide• B. Middle is composed of

compact bone• C. Ends are typically spongy

bone• D.

Example:________________

http://www.nlm.nih.gov/medlineplus/ency/imagepages/9582.htm

Classification of Bones• 206 bones total in the adult human

body• Types of Bone• 1. Compact • 2. Spongy • 3. Long • 4. Flat• A. Thin, flattened and usually curved• B. Spongy bone sandwiched between

compact bone• C. Example:____________________

http://www.teachpe.com/anatomy/types_of_bones.phphttp://www.tpub.com/content/medical/10669-c/css/10669-c_35.htmhttp://curezone.com/forums/am.asp?i=1668390

Classification of Bones• 206 bones total in the adult human

body• Types of Bone• 1. Compact • 2. Spongy • 3. Long • 4. Flat• 5. Irregular• Example:_____________________

http://www.shoppingtrolley.net/teaching-exercise-to-music-lesson1-page2.shtmlhttp://www.teachpe.com/anatomy/types_of_bones.php

Summary of Different types of bone

Labeling the skeleton