Major Tissue Types and Their Functions in Anatomy & Physiology
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The four major tissue types are epithelial, connective, muscle, and nervous tissue.
Epithelial tissue covers body surfaces, lines cavities, and forms glands, providing protection, absorption, secretion, and filtration.
The main types are squamous (flat), cuboidal (cube-shaped), and columnar (tall and column-shaped) epithelial cells.
Simple epithelium has one cell layer; stratified epithelium has multiple layers; pseudostratified epithelium appears layered but is a single layer.
It allows for rapid diffusion and filtration, found in lungs and blood vessel linings.
Found in areas subject to abrasion like skin and mouth; it provides protection.
It functions in secretion and absorption, commonly found in kidney tubules and glands.
It specializes in absorption and secretion, often lining the digestive tract.
It appears layered but is a single layer; it often has cilia and mucus secretion to trap and move particles in respiratory tract.
Main types include loose connective tissue, dense connective tissue, cartilage, bone, and blood.
It binds organs, holds tissue fluids, and provides cushioning and support.
Contains tightly packed collagen fibers; it provides strong, flexible support in tendons and ligaments.
Cartilage provides flexible support and cushioning in joints, ear, and nose.
Bone provides rigid support, protects organs, and stores minerals.
Blood transports nutrients, gases, and wastes throughout the body and plays a role in immune defense.