Bio 8 sect 1lab

Bio 8 sect 1lab - January 28, 2008 Connective Tissue...

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White fat – most common in human Brown fat – produces heat Signet Ring Appearance Nucleus Lacunae - cavities Lacunae Canaliculli Lamellae Osteon Central canal Osteocytes in Lacunae 2 3 4 5 6 1 1 1 1 2 2 6 total Fontanels Origin Direction of movement Bone Insertion Bone Tendon Belly Deep fascia Epimysium Perimysium Sarcolemma Endomysium Fascicle P – power point L – lever (bone) R – weight or resistance F – Fulcrum (joint) R P L F P R F L P F R L January 28, 2008 Connective Tissue Connective Tissue Connective Tissue Proper (ordinary) Special Connective Tissue Loose Fibrous (alveolar) Dense Reticular Adipose Hemopoietic (blood-forming) Support 1. Irregular Cartilage Bone 2. Regular 1. Hyaline 1. Compact 2. Elastic 2. Cancelous 3. Fibrocartilage 3 types of fibers composed of: Collagen – collagenous (bundles) Reticular – networks, support, thick Elastin – elastic, networks, elasticity, small, thin Types of Connective Tissue 1. Loose – found throughout body Loosely organized, houses mast cells, macrophages, fibroblasts 2. Adipose – fat tissue 95% of mass can be fat Looks like empty space, accumulates in groups, storage place for energy, fat 3. Reticular – Supports organs Found in liver and lymphatic system 4. Dense – Many fibers few fiber blasts little liquid Regular – all run in one direction close together, little blood supply, gives strength in tendons
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Irregular – more woven less organized, forms sheath Support - bear weight, all have a solid but flexible ground substance, all have a membrane that is capable of producing cells. Cartilage - perichondrium cells, chondrocytes sit in lacunae Bone - periosteum cells, osteocytes a. Cartilage – chondrotin sulfate is found in ground substance a. Hyaline – smooth and slippery found in the lining of joints, pearly, found in fetal bones, and is slowly ossified. b. Elastic – elastic fibers run throughout, found in ear, nose, epiglottis c. Fibrocartilage - arranged between bundles of fibers, found in groups on top of each other. Used for cushioning found in vertebrae. 5. Bone - matrix with a high mineral content, calcium and phosphate “organic cement” is very strong and light weight Compact - osteon (self-contained cylinder units) running throughout compact bone. Lamellae are layers of osteons. Central canals are in the center of all osteons. Lacunae house osteocytes. Each osteon is connected by a cement layer. Canaliculli help osteocytes communicate with each other. Volkmann’s canals connect osteons. a. Spongy Bone – found on inside of compact bone. Trabeculae makes caverns in plates and house Hemopoietic tissue and marrow is found. Sharpey’s Fibers - connect the periosteum to the compact bone.
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Long Bones Shaft – diaphysis Ends – epiphyses Connection – metaphyses Closure – epiphyseal disk Center – medullary cavity (hollow) Yellow Marrow – fatty marrow only in adults Lining cavity – endosteum membrane (inside) Lining bone – periosteum membrane (outside)
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Bio 8 sect 1lab - January 28, 2008 Connective Tissue...

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