Lecture 27 – Histology – Connective Tissue

Lecture 27 – Histology – Connective Tissue

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Lecture 27 – Histology – Connective Tissue A. Introduction - Types Bone, fat, vascular, fascia 1. Supporting and binding - Binding = around kidneys, helps keep its shape - Bones support you, fascia supports organs 2. Cells, fibers, m atrix (consists of three parts): 1) Cells – actual cells 2) Extracellular components (fibers and the m atrix) 1) Fibers – strings and chords 2) Matrix is considered a morphous ground substance such as plas m a in blood) 3. Cell types a) Fibroblast – “blast” = “formation of;” m akes fibers (found in connective tissue, while yo are developing there are m any fibroblasts in the connective tissue); also, fibroblasts m new tissue after injury (fibroblast # decreas es when you grow older) b) Chondrocyte – cell type that is found in cartilage; they can m ake fibers, but not always secretes the m atrix c) Osteoblast (table 38.2, fig-38.2) = “bone formation;” when you are an e m bryo compos of cartilage m a ny osteoblasts are found (found at the ends of long bones where cartila m ust be converted to bone [epiphysis], this process is called ossification) d) Osteocyte – “bone cell;” this is a m ature bone cell, the osteocyte m aintains the bone b 1) May deposit fibers 2) Deposit m atrix (made of calcium phosphate The regulation is under hormonal control e) Osteoclast – destroys the bones by removing calcium; when the calcium concentration the blood is low the bones act as a repository f) Adipocyte (table 38.2) – “fat cell;” 2 m ajor fat cell types 1) White fat cells – what you normally think of when you think of fat; us ed for storage and
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This note was uploaded on 05/30/2008 for the course BS 131 taught by Professor Smith during the Spring '08 term at University of the Sciences in Philadelphia.

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Lecture 27 – Histology – Connective Tissue

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