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Merrill Chpt 3

Osteology Part 2

QuestionAnswer
How many bones in typical adult skeleton? 206
What are the 2 main skeletal divisions that make up bony framework of body? Appendicular and Axial
What are the 4 main parts of Appendicular skeleton? Pelvic girdle, shoulder girdle, upper limbs & lower limbs (extremities)
What are the 4 main parts of Axial skeleton? Ribs, skull, sternum, & vertebral column
Strong, dense outer layer of bony tissues is called? Compact bone
Inner, less dense trabeculated portion of the bone is called? Spongy bone
Central cylindrical canal of long bones is called? Medullary cavity
Tough, fibrous connective tissue that covers the bone (except at articular ends) Periosteum
Name the 5 classifications of bones Flat, long, short, irregular,& sesamoid
What classification does the Tibia belong in? Long
What classification does the Lunate belong in? Short
What classification does the Radius belong in? Long
What classification does the Patella belong in? Sesamoid
What classification does the Scapula belong in? Flat
What classification do Facial bones belong in? Irregular
What classification does the Vertebrae belong in? Irregular
Define Long bones Consist of a body and 2 articular ends.
Define Short bones Consist of spongy tissue and have a thin layer of compact bone
Define Flat bones Consist of compact bone in form of 2 plates that enclose a layer of spongy tissue
Define Irregular Are a peculiar shape, can't be classified as long, short, or flat
Define Sesamoid Are small oval bones that develop in/near tendons and function to protect tendons from excessive wear
How many bones are in the axial and in the appendicular skeletal? Axial = 80 bones. Appendicular = 126 bones
T/F: The appendicular skeleton protects the head & trunk? False
The appendicular skeleton provides means for what? Movement
Trabeculae is filled with what? Red & yellow marrow
What does red marrow produce? Red & white blood cells
Stores fat cells Yellow marrow
Medullary cavity contains? Trabeculae filled with yellow marrow
T/F: Medullary cavity contains red marrow found in ends of long bones True
What lines marrow cavity Endosteum
What term in bone development applies to the development and formation of bones? Ossification
Bone development begins in what month of embryonic life? 2nd
What are the 2 bone development processes? Intermembranous and Endochondral
Flat bones are formed by ______ ossification? Intramembranous
Short, irregular, & long bones are created by _____ ossification? Endochondral
Endochondral ossification occurs from 2 distinct centers of development, they are? Primary and Secondary
Primary ossification begins before____ and forms_____ of long bones Birth; long central shaft
Secondary ossification occurs ____ birth when separate bones begin to develop at ______of long bones After; both ends
What are the ends of the long bones called in secondary ossification Epiphyses
What classification does the Femur belong in? Long
What classification does the Humerus belong in? Long
What classification does the Carpal bones (wrist/ankles) belong in? Short
What classification does the Cranium belong in? Flat
What classification does the Sternum belong in? Flat
Diploe is what? The flat bones middle layer of cancellous bone
What classification does the Pelvis belong in? Irregular
All of the following are functions of the skeleton, EXCEPT A. attachment for muscles; B. storage for calcium, phosphorus, & other salts; C. production of minerals; D. production of red/white blood cells Production of minerals
Which of the following can be palpated to T7? A. Jugular notch; B. Sternal angle; C. Inferior angle of the scapula; D. Xiphoid process Inferior angle of the scapula
Created by: swisscheese