Extracellular matrix has ground substances and fibers eiii1a The ground

Extracellular matrix has ground substances and fibers

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Extracellular matrix has ground substances and fibers e.iii.1.a. The ground substances would be the hydroxyapatite e.iii.1.b. Fibers would be type 1 collagen e.iii.2. Tunnels leading to the central canal f. Spongy bone f.i. Found in the interior of bone f.ii. Typically associated with bone marrow f.iii. Surface of all spongy bone – lined by endosteum f.iv. Cranium f.iv.1. Cranking out blood and cramming into the plasma f.v. Spongy bone is used for lightening up bones f.v.1. The predominant reason f.vi. Have spaces to harvest bone marrow f.vii. Where the force is applied that is where the trabeculae is going towards
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g. Long Bone g.i. Shaft is called diaphysis g.i.1. Outer surface is compact bone g.i.2. Marrow cavity is on the inside g.ii. Epiphysis g.ii.1. Two types of bone marrow: red or yellow g.ii.2. Red marrow is actively making blood g.ii.2.a. Making plasma, red blood cells, white blood cells g.ii.3. Yellow marrow g.ii.3.a. Aged red bone marrow g.ii.3.b. A result of aged bones, where fat cells accumulate in the red bone marrow, so as hematopoiesis activity goes down more triglycerols pile up in the red bone marrow, thus making it into yellow bone marrow g.ii.3.c. One of the reasons why immune system is compromised when you’re older because there is less red bone marrow to actively make white blood cells g.ii.3.c.i. Also the thymus gland disappears when your age hits 40 g.iii. Articulating cartilage g.iii.1. The bone had a highland cartilage all throughout before g.iii.2. Doesn’t have perichondrium g.iii.3. Only cartilage left that was never replaced by bone g.iii.4. Epiphyseal cartilage g.iii.4.a. Eventually this cartilage is replaced by bone g.iii.4.b. Epiphyseal line is only found in adult bones g.iii.5. The outer surface of the compact bone is a connective tissue called periosterium g.iii.5.a. Just like a perichondrium= Dense or irregular connective tissue, fiber glass and blood vessels
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g.iii.5.b. Inner cell layer g.iii.5.b.i. Instead of 3 cells it has 4 g.iii.5.b.ii. Replace chondrium with osteo g.iv. Endosteum g.iv.1. No connective tissue, just a lining of cells g.iv.2. It lines the surface of the spongy cells g.iv.3. Lines the inside of the medullary cavity g.iv.4. Lines the inside of the aversion canals g.v. Nutrient Foramen g.v.1. A hole inside the bone in which red blood vessels go through to keep the bone alive g.vi. Periosteum g.vi.1. Diploe bone (specialized spongy bone) - spongy bone found in cranial bone 2. Microscopic Bone Structure a. Matrix is densely packed with calcified protein fibers b. Matrix contains osteocytes in lacunae c. Osteocytes communicate through canaliculi d. Periostedum surrounds outer surfaces of bone e. Collagen fibers e.i. Prevents you from stretching your bones e.ii. Very strong structure e.iii. Allows bone to be very hard, but not brittle: a composite structure that lays down the type 1 collagen fibers then the hydroxyapatite f. Cells of the Bone f.i. Osteocyte f.i.1. Gets trapped in the matrix and in the lacunae f.i.2. Osteoblasts that get trapped in the lacunae is osteocytes
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f.ii.
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