3 - UNIT 3 Bones and Skeletal Tissues (Chapters 6 and 7)...

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UNIT 3 Bones and Skeletal Tissues (Chapters 6 and 7) Cartilage Bone Tissue and Structure Bone Homeostasis, Growth, and Repair Bone Disorders (7th edition)
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How to Study for this Unit The following lecture follows your textbook very closely; read the outline and the associated sections in Chapter 6 and 7 of your textbook; do not try to learn the specific and bone structures of the axial and appendicular skeleton yet; you will learn that information in your next 2 units (Units 4 & 5); in this unit you will learn a about the overall makeup of the axial and appendicular skeletons (7th edition)
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Skeletal Cartilages CHONDROCYTES (cartilage cells) are found in LACUNAE (spaces) within an EXTRACELLULAR MATRIX ; cartilage is surrounded by an outer membrane called the PERICHONDRIUM (“peri-” means to surround) Types of cartilage: HYALINE cartilage – most abundant cartilage; provides support through flexibility; most cartilage of the human body is composed of hyaline cartilage ELASTIC cartilage – contains many elastic fibers; able to tolerate repeated bending; only found in the ear and epiglottis of the larynx FIBROCARTILAGE – resists strong compression and strong tension; an intermediate between hyaline and elastic cartilage; only found in the knees, pubic symphysis, and intervertebral discs (7th edition)
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Location of cartilage ear ( elastic cartilage ) and nose ( hyaline cartilage ) articular cartilages (in joints) and costal cartilage (connect to ribs) -- both are made of hyaline cartilage intervertebral discs and pubic symphysis -- both are made of fibrocartilage (fig. 6.1) (7th edition)
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Location of cartilage larynx ( hyaline cartilage ), except for the epiglottis ( elastic cartilage ) (fig. 6.1) (7th edition)
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Bones are organs that contain several different types of tissues, including connective tissues (e.g. bone, blood, and cartilage), nervous tissue, and other tissues http://www.flickr.com/photos/rachelrusinski/77870663/ (7th edition)
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Classification of Bones long bones – longer than wide; a shaft plus ends; e.g. humerus and femur short bones – roughly cube- shaped; e.g. bones of the hand and feet flat bones – thin and flattened, usually curved; e.g. sternum irregular bones – various shapes; do not fit into other categories; e.g. vertebra (fig. 6.2) (7th edition)
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Functions of Bones support - a hard framework that supports the weight of the body protection - of underlying tissues; e.g. the rib cage protects the heart and lungs movement - skeletal muscles use bones as levers mineral storage - bones serve as a reservoir for minerals, especially calcium and phosphate; these minerals are stored or released depending on their need in the body blood cell formation - red bone marrow makes blood cells in a process known as HEMATOPOIESIS (7th edition)
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Gross Anatomy of Bones Bone Markings (Table 6.1); you will learn the different types of bone markings in Units 4 & 5 when you study the individual bones of the axial and appendicular skeleton; do not bother trying to memorize this table; Just give
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3 - UNIT 3 Bones and Skeletal Tissues (Chapters 6 and 7)...

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