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Simple squamous epithelium

Function: Allows passage of materials by diffusion and filtration in sites where protection is not important; secretes lubricating substances in serosae.

Location: Kidney glomeruli, air sacs of lungs, lining of heart, blood vessels, and lymphatic vessels; lining of ventral body cavity(serosae)

Simple cuboidal epithelium

Function: secretion and absorption

Location: Kidney tubules; ducts and secretory portions of small glands, ovary surface.

Simple columnar epithelium

Function: Absorption; secretion of mucus, enzymes, and other substances; ciliated type propels mucus (or reproductive cells) by ciliated action.

Location: nonciliated type lines most of the digestive tract (stomach to anal canal), gallbladder and excretory ducts of some glands; ciliated variety lines small bronchi, uterine tubes, and some regions of the uterus.

Psuedostratified ciliated columnar epithelium

Function: Secretion, particularly of mucus; propulsion of mucus bu ciliary action.

Location: nonciliated type in male's sperm-carrying ducts and ducts of large glands; ciliated variety lines the trachea, most of the upper respiratory tract.

Stratified squamous epithelium

Function: protects underlying tissues in areas subject to abrasion

Location: nonkeratinized type forms the moist lining of the esophagus, mouth, and vagina; keratinized type forms the epidermis of the skin, a dry membrane.

Stratified cuboidal epithelium

Function: protection

Location: Largest ducts of sweat glands, mammary glands, and salivary glands.

Stratified columnar epithelium

Function: protection and secretion

Location: rare in the body; small amounts in male urethra and in large ducts of some glands

Transitional epithelium

function: stretches readily and permits distension of urinary organ by contained urine

Location: lines the ureters, urinary bladder, and part of the urethra

Mesenchymal tissue

Function: gives rise to all other connective tissue types

Location: primarily in embryo

Areolar connective tissue

Function: wraps and cushions organs

Location: widely distributed under epithelia of body

Adipose tissue

Function: provides reserve fuel; insulates against heat loss; supports and protects organs

Location: under skin, around kidneys and eyeballs, within abdomen, in breasts.

Reticular connective fibers

Function: fibers form a soft internal skeloteton that supports other cell types, including white blood cells, mast cells, and macrophages

Location: lymphoid organs (lymph nodes, bone marrow, spleen)

Dense regular connective tissue

Function: attaches muscles to bones or to muscles; attaches bones to bones; withstands great tensile stress when pulling force is applied in one direction

Location: tendons, most ligaments, aponeuroses

Elastic Connective tissue

Function: allows recoil of tissue following stretching; maintains pulsatile flow of blood through arteries; aids passive recoil of lungs following inspiration

Location: walls of large arteries; within certain ligaments associated with vertebral column, within the walls of the bronchial tubes

Dense irregular connective tissue

Function: able to withstand tension exerted in many directions; provides structural strength

Location: fibrous capsules of organs and joints; dermis of the skin; submucosa of digestive tract

Hyaline cartilage

Function: supports and reinforces; has resilient cushioning properties; resists compressive stress

Location: forms most of the embryonic skeleton; covers the ends of long bones in joint cavities; forms the costal cartilages of the ribs, cartilages of the nose, trachea, and larynx.

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