Gen Bio tissues

• Tissues are composed of similarly specialized cells that perform a common function in the body.
• Epithelial Tissue is for protection, absorption, and excretion of materials. (skin, lining of digestive tract, and some glands)
• Epithelial tissue is a type of tissue that is commonly seen outside the body, as covering or linings of organs and cavities.
• Epithelial tissue is characterized by closely-joined cell with tight junctions.
• Epithelial tissue being tightly-packed, tight junctions serve as barriers for pathogens, mechanical injuries and fluid loss.
• Squamous Epithelium is composed of flattened cells and is found lining the lungs and blood vessels.
• Cuboidal Epithelium contains cube-shaped cells and line the kidney tubules.
• Columnar Epithelium has cells resembling rectangular pillars or columns, with nuclei usually located near the bottom of each cell.
• Ciliated Epithelium has tiny hair like structures on the surface of the cell, found in the airways, the uterus and fallopian tubes, the efferent ducts of the testes, and the ventricular system of the brain.
• Glandular Epithelium is composed of cells that are specialized to produce and secrete substances.
• Simple means the tissue has a single layer of cells.
• Stratified means the tissue has layers one on top of another.
• Cuboidal is for secretion.
• Simple Columnar is for secretion and active absorption.
• Simple Squamous is for exchange of materials through diffusion.
• Stratified Squamous is multilayered and regenerates quickly, for protection.
• Pseudostratified is for lining of respiratory tract, usually lined with cilia.
• Simple Squamous Epithelium is found in the air sacs of lungs and the lining of the heart, blood vessels, and lymphatic vessels.
• Simple Squamous Epithelium allows materials to pass through by diffusion and filtration, and secretes lubricating substance
• Simple Cuboidal Epithelium is found in ducts and secretory portions of small glands and in kidney tubules
• Simple Cuboidal Epithelium secretes and absorbs
• Simple Columnar Epithelium is found in ciliated tissues that are in bronchi, uterine tubes, and uterus; smooth (nonciliated tissues) are in the digestive tract, bladder
• Simple Columnar Epithelium absorbs and it also secretes mucus and enzymes
• Pseudostratified Columnar Epithelium is found in the ciliated tissue that lines the trachea and much of the upper respiratory tract
• Pseudostratified Columnar Epithelium secretes mucus; ciliated tissue moves mucus
• Stratified Squamous Epithelium lines the esophagus, mouth, and vagina
• Stratified Squamous Epithelium protects against abrasion
• Stratified Cuboidal Epithelium is found in the sweat glands, salivary glands, and the mammary glands
• Stratified Cuboidal Epithelium is a protective tissue
• Stratified Columnar Epithelium is found in the male urethra and the ducts of some glands
• Stratified Columnar Epithelium secretes and protects
• Transitional Epithelium lines the bladder, urethra, and the ureters
• Transitional Epithelium allows the urinary organs to expand and stretch
• Cardiac Muscle – involuntary; has striated, branched, unnucleated fibers occurs in walls of heart.
• Skeletal Muscle – voluntary; has striated, tubular, multinucleated fibers; usually attached to the skeleton.
• Smooth Muscle – involuntary; has spindleshaped, non-striated unnucleated fibers fibers; occurs in walls of internal organs.
• Connective Tissues provide support, binding of epithelial tissue to structures, support and transport of substances. (under skin. Surrounding organs, blood and bones) 
• Connective Tissue bind organs together, provide support and protection, fills spaces, produces blood cells, and stores fats.
• Connective Tissues - bones, cartilage, blood
• Areolar Connective Tissue is widely distributed and serve as a universal packing material between other tissues. It support and binding of other tissues. It helps in defending against infection.