Basic Tissue Types - Zoology - Quiz, Exercises for Zoology. All India Institute of Medical Sciences
ayushmati23 December 2012

Basic Tissue Types - Zoology - Quiz, Exercises for Zoology. All India Institute of Medical Sciences

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Basic Tissue Types, Epithelial Tissue, Connective Tissue, Muscular Tissue, Nervous Tissue, Characteristics of Et, Number of Cell Layers, Fluid Exchange, Diversity of Types. Sometimes quiz are helpful in preparing for exa...
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Tissue (def.): a group of cells with similar structure that work together to perform specific functions in the body; may also include extracellularmatrix around cells

- cells that make up a tissue usually have a common embryonic origin - tissues are the “living fabric” that form organs and other higher-level body structures. - structures and properties of tissues are closely related to their specific functions

Basic Tissue Types Epithelial tissue Connective tissue Muscular tissue Nervous tissue

I. Epithelial Tissues A. Characteristics of ET Functions of ET

• densely packed sheets of cells protection • cover or line surfaces; also form glands secretion • apical and basal sides absorption

apical side faces free surface or lumen gas exchange basal side attaches to basement membrane fluid exchange (capillaries)

• avascular • regenerative

B. Classification of ET 1. Number of cell layers 2. Shape of cells Examples

simple (1) squamous simple squamous epithelium stratified (2 or more) cuboidal simple cuboidal epithelium pseudostratified columnar simple columnar epithelium

stratified squamous epithelium pseudostratified ciliated columnar epith.

II. Connective Tissues A. Components of CT

1. cells (fibroblasts, adipocytes, immune cells, tissue-specific cell types) 2. extracellular matrix

a) ground substance (water + salts+ organic molecules: GAGs, proteins) b) fibers (collagen, elastic, etc.)

B. Characteristics of CT Functions of CT • cells scattered in extracellular matrix bind and connect body structures • vascular (most types) support: structural, metabolic • diversity of types and properties immune defense

C. Classification of CT Examples Loose CT areolar CT

adipose tissue Dense CT dense regular CT

dense irregular CT Cartilage hyaline cartilage Bone compact bone Blood and Lymph

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