KIN 324K LAB LECTURE 2

KIN 324K LAB LECTURE 2 - Applied Human Anatomy Lab Lab...

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Applied Human Anatomy Lab Lab Lecture II: Bone, Skeletal Muscle, Heart, Circulatory System
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General Information Lab Time: Tues. 1-4 PM, BEL 404 Fri. 1-4 PM, BEL 404 Attendance is mandatory; 3 absences will results in an F Excused absences require official reason, advanced notice Office Hours: 10-noon, M-F; BEL 966
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Bones are organs Functions Support, framework of body Protection Movement (levers) Mineral (Ca 2+ , PO 4 3-) , growth factor storage Blood cell formation (in marrow cavities)
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Bone Cells Osteoblasts : bone-forming cells Osteocytes : mature bone cells Osteoclasts : remodel/break down bone Chondroblasts : produce cartilage Hemotopoietic cells : form blood cells Found in marrow
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Classification of Bones (6) Long : all limb bones Most studied in this lab Short : roughly cube shaped (wrist, ankle) Sesamoid : forms in tendon (ex. Patella) Flat : thin, sometimes curved (sternum, ribs) Irregular : complicated shapes (vertebrae, hip) Sutural : in sutures between the bones of the skull
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Bone Classification cntd.
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Long Bone Anatomy: Structure Diaphysis : long shaft Compact bone forms outer layer, spongy composes core Epiphysis : expanded areas at end of shaft Spongy bone composes epiphysis
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Long Bone Anatomy cntd.
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Long Bone Anatomy: Tissue Periosteum : dense, thick covering; 2 layers Outer: dense, irregular connective tissue Inner: osteoblasts (bone-forming) & osteoclasts (bone-destroying) Sharpey’s fibers : collagen fibers that secure periosteum to underlying matrix Endosteum : lines marrow cavity
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Compact Bone Tissue Haversion System Osteon : functional unit of bone Haversion canal : central, contains blood vessels, nerves Longitudinal (parallel) to bone Volkmann’s canal : allows diffusion of nutrients, waste products, etc. to lacunae Perpendicular to longitudinal axis Lacunae : small pockets between lamellae; contains osteocytes Lamellae : concentric rings of bony matrix Osteocyte : mature bone cell
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Compact Bone Tissue cntd.
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Spongy Bone Tissue Looks poorly organized Marrow : fills space inside; red & yellow types
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Bone Matrix Organic Component (Osteoids) Composed of proteoglycans, glycoproteins, & collagen fibers Inorganic Component Consists of hydroxyapatites Composed of mineral salts (calcium phosphate) Gives bone hardness, ability to resist compression
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Classification of Joints (3) Synarthrotic (Cartilaginous) : no movement or joint cavity; connected by fibrous connective tissue Sutures: between bones of skull Synchondrosis: between epiphysis/diaphysis Gomphosis: teeth in jaw sockets Amphiarthrotic : little movement, no joint cavity; connected by ligamentous/cartilaginous tissue Syndesmosis: between tibia/fibula, ulna/radius Symphysis: between adjacent vertebrae Synovial / Diarthrotic : free movement; most joints Fluid-containing joint cavity
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This note was uploaded on 04/12/2009 for the course KIN 75275 taught by Professor Farra during the Summer '08 term at University of Texas.

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KIN 324K LAB LECTURE 2 - Applied Human Anatomy Lab Lab...

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