Tissues grade 11
Tissues are groups of similar cells working together for a specific job, forming the body's fabric , with four main types in humans: Epithelial (coverings), Connective (support/bind), Muscle (movement), and Nervous (communication). They are organized above cells and below organs, allowing for complex functions like pumping blood (muscle) or sending nerve signals (nervous). The Four Primary Tissues Epithelial Tissue : Forms linings, coverings, and glands; functions in protection, secretion, absorption (e.g., skin, kidney tubules). Connective Tissue : Supports, connects, protects, and insulates; includes bone, blood, fat, cartilage, and ligaments (e.g., bone, blood, tendons). Muscle Tissue : Contracts to produce movement; types are skeletal, smooth, and cardiac. Nervous Tissue : Transmits electrical signals; composed of neurons (ne...