Functions of Tissues - Anatomy - Lecture Slides, Slides of Dental Anatomy

Download Functions of Tissues - Anatomy - Lecture Slides and more Slides Dental Anatomy in PDF only on Docsity! •Histology = The study of tissues •Tissue = A collection of cells that perform related functions, and are similar in structure •The Four Primary Tissue Types: •Epithelial •Connective •Muscular •Nervous Chapter 4, Tissues, Part 2 1Docsity.com Connective Tissue: Supports, protects, binds tissues Structural characteristics:  Specialized cells, few in number  Extracellular matrix  fibers (collagen)  Ground substance (fluid-like) •The Four Primary Tissue Types Epithelial Connective Muscular Nervous 2Docsity.com Connective Tissue Proper CONNECTIVE TISSUE PROPER | fe Il LOOSE ____ DENSE Fibers create Fibers densely hose, open framework pa ¢ Loose (areolar) Adipose Reticular ww Docsity.cong Loose Connective Tissue  - viscous EC matrix, fibers not aligned 1. loose (areolar) C.T. 2. adipose 3. reticular 6Docsity.com 1. Areolar (AKA loose)  Most widespread  Beneath most epithelia  Think dermis!!!  Types of Fibers: • Collagen • Elastic • Reticular 7Docsity.com 3. Reticular  Resembles areolar CT, but  Reticular fibers only  “reticulum” = network  Bone marrow, spleen A special stain demonstrates the reticular fibers Spleen 10Docsity.com Dense Connective Tissue rears LOOSE DENSE Fibers densely framework Packed elrregular eRegular (®) Elastic wo Docsity .com 1. Dense Irregular C.T.  Collagen fibers in many directions  Resist multi-directional tension  Joint capsules 12Docsity.com Supporting C.T.  Cartilage  Hyaline  Elastic  Ear, larynx  Fibrocartilage  Intervertebral discs  Bone (Chapter 6)  Mineral matrix Check Chapt 6, p 125 15Docsity.com Hyaline Cartilage  I.C. Matrix appears homogeneous  Chondroblasts and chondrocytes in lacunae  Articular cartilage  Tracheal rings 16Docsity.com Elastic cartilage  More elastic fibers  Ear  IV disk  Symphysis pubis  Meniscus Fibrocartilage 17Docsity.com Membranes = Combination of Epithelia & C.T. (p 88) Mucous membranes,  Lining of cavities that communicate with exterior  Serous membranes,  Lining of sealed, internal cavities  Cutaneous membranes,  Skin  Synovial membranes,  Joints Know special names of serous membranes depending on location Also know difference between “parietal” and “visceral” 20Docsity.com Mucous vs. Serous Membrane AKA mucosa Mucous secretion Epithelium Lamina propria (loose connective tissue) Transudate Epithelium Loose _ connective tissue Docsity .copy  Cutaneous (skin) & Synovial Membranes } Epithelium } Connective tissue Articular (hyaline) cartilage Synovial fluid Capsule Fibroblast Adipocytes Loose connective . Synovial membrane tissue Epithelium wo Docsity .copp Cardiac Muscle (chap 19) •Heart (Only) •Involuntary •Striated, but poorly •Intercalated disks •Heavily branched •Single central nucleus 25Docsity.com Smooth Muscle (chap 23)  Involuntary  Esp. digestive system  No striations  Very slow  Single central nucleus 26Docsity.com Nervous Tissue (ch 12)  Neurons  Transmit electrical impulses  Neuroglia  Supportive cells of the nervous system •The Four Primary Tissue Types Epithelial Connective Muscular Nervous 27Docsity.com