TISSUE The Living Fabric.

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Presentation transcript:

TISSUE The Living Fabric

Four Types of Tissue Epithelial (protection) Connective (support) Muscle (movement) Nervous (control)

Epithelial Tissue Covering & Lining Epithelium Glandular Epithelium

Classified by: Shape Number of Layers

Squamous Flattened and Scalelike

Cuboidal As tall as they are wide

Culumnar Tall, Column-Shaped

Arrangement Simple Stratified

Simple Squamous

Simple Columnar

Stratified Squamous

Pseudostratified Squamous

Functions of Epithelium Protection Absorption Secretion Sensory Functions

Features of Epithelium Cell Junctions are Tight Basement Membrane Avascular (no vessels) Highly Regenerative

Covering and Lining Epithelium

Location Endothelium: Simple, Reduces Friction (Vessels) Mucous Membranes: Line body cavities that are open to the exterior. (Mouth, Nose)

Location Cutaneous Membrane: Skin, Keratinized stratified squamous, dry membrane Serous Membrane: Moist, Closed ventral body cavities, Reduce friction

Glandular Epithelium Specialized for Secretion One or more epithelial cells Exocrine: Ducts (Saliva glands, Pancreas) Endocrine: Ductless, Directly into Extracellular Space (Hormones)

Connective Tissue

General Properties Most abundant and varied of all tissues Primary function: bind the other tissues or the body.

Matrix: Nonliving, extracellular material, separates cells of the tissue. Allows tissue to bear weight, tension, and endure abuses

Connective tissues develop from embryonic tissue known as MESENCHYME

CELLS 1. Fibroblasts: produce fibers and carbs and protein constituents of matrix

Chondroblast: Cartilage Osteoblast: Bone Hemocytoblast: Blood

FIBERS Collagen Most abundant White fibers Tough, inelastic

FIBERS Reticular Finely branched Composed of collagen EX. Basement membrane, small blood vessels

FIBERS Elastic Yellow fibers Elastin (protein) Ex. Skin, lungs, vessels

Connective Tissue Proper Two subclasses: Types of C.T. Connective Tissue Proper Two subclasses:

Loose connective (areolar, adipose, reticular) Dense connective (Dense regular, Dense irregular, Elastic)

Dense regular connective

Elastic Cartilage

Cartilage: tough yet flexible, avascular Chondrocytes Perichondrium: well-vascularized dense irregular connective tissue membrane

Bone Main supporting tissue Compact bone & spongy bone Well supplied by blood vessels

Blood Blood and lymph are circulating connective tissues Red marrow-blood cells

Skeletal: Voluntary control, attached to bone. Muscle Tissue Skeletal: Voluntary control, attached to bone.

Cardiac: Involuntary, Heart, branched cells joined end to end.

Smooth: Involuntary Lining of organs, vessels

Nervous Functions Receive stimuli Transmit info Control action of muscle and glands