Tissue Types

simple squamous

• A single, flat layer of cells that is thin and permeable

• Rapid diffusion

• Blood vessels and lung tissues

• keratin or non-keratinized

simple cuboidal

• Single layer of cube-shaped cells

• Secretion and absorption

• Tissue in kidneys

simple columnar

• Single layer of tall, closely packed cells

• Contain cilia and goblet cells

• Secretion of mucus for protection and absorption.

• Lining of digestive track

pseudostratified columnar

• Nuclei are found at different levels

• Appears stratified, but not

• Secretion and absorption

• Upper respiratory tract

stratified squamous

• Thick layer that provides protection for the underlying layers

• Epidermal layer of skin

stratified cuboidal

• More than one layer of cuboidal cells (rare)

• Salivary and mammary glands

stratified columnar

• Free surface is lined with columnar cells (rare)

• Larynx and the male urethra

transitional

• Free surface cells

• Change shape, elastic

• Lining of urinary bladder

exocrine glandular

• secrete substances through ducts

• sweat, mammary, and sebaceous glands

endocrine glandular

• ductless, secrete through the bloodstream (exocytosis)

• Capillaries

• Thyroid, thymus, adrenal glands, and pancreas

Osseous tissue

• osteocytes secrete ground substances, fibers, collagen, and fluids

• spongy and compact

hyaline cartilage

• firm ground substance with lacuna

• few collagen fibers

• Larynx, bridge of nose, and ribs

fibrocartilage

• lots of collagen

• intervertebral spaces

elastic cartilage

• flexible

• outer ear and tip of nose

dense connective tissue

Regular, irregular, and elastic

loose connective tissue

Areolar, adipose, and reticular

areolar

• holds water and salts from surrounding tissue

• epithelium and around organs

adipose

• made of fat cells

• insulates and warms body

• provide nutrients

reticular

• stiff framework of fibers

• lymph nodes and tonsils

vascular tissue

Mast cells, macrophages, and blood cells

smooth muscle tissue

• involuntary

• non-striated

• walls of stomach, uterus, intestines, bladder, arteries, veins, and eyes

cardiac muscle tissue

• involuntary

• striated

• heart muscle

• activated by brain or hormones

skeletal muscle tissue

• voluntary

• striated

• bones of skeleton

• controlled by somatic nervous system

nervous tissue

• neurons (the celebrity)

• neuroglia (the support staff)