Bones

Skeleton consists of 206 bones.

Subdivisions

• Axial• Appendicular

Axial Skeleton

Bones are organs composed of the following tissues:

• Bone tissue• Cartilage• Epithelial• Fibrous connective tissue• Blood connective • Nervous tissue

Shapes of Bones

Long –vs- Irregular BoneIrregular Bone

Types of Bone Growth

• Intramembranous• Skull

– Comes from primitive connective tissue cells

• Endochondral• All other

– Comes from cartilage

Endochondral Bone Growth

Endochondral

Spongy –vs-Compact

• Spongy found in the expanded end region of long bones and fills irregular space.

• Compact on outer bone and shafts of long bones.

Intramembranous Bone Growth

Bone Fractures

Broken Bone

Fractures heal more quickly:

-in young individuals

-in upper limbs as opposed to lower limbs

-in spongy bones –vs- compact bone

Bone Fracture Film

How recent?

Skull

Spine Video

http://www.youtube.com/watch?v=qigpRFN5o04&feature=related

Cervical Vertebrae

Vertebrae Activity

-Examine the vertebrae in the back of the room and determine which type of vertebrae each is and where it fits on the vertebral column.

-Have a partner or teacher test your knowledge.

Ribcage

Ribcage Activity

Examine a skeleton and find the true ribs, false ribs, and floating ribs.

Find the sternum, manubrium, and xyphoid process.

Have a teacher or partner quiz you.

Joints

http://www.youtube.com/watch?v=zWo9-3GJpr8

You name the joint

http://www.youtube.com/watch?v=VNbrvU7MgY0&feature=related

Range of Motion Lab