simple squamous epithelium
1 layer thick; flattened in shape; used in diffusion and filtration; found in air sacs in lungs, lining of blood vessels (exchange takes place in capillaries)
simple cuboidal epithelium
Single layer of cube shaped cells, usually with spherical nuclei. Covers ovaries and lines most of the kidney tubules and the ducts of certain glands.
simple columnar epithelium
single layer of column shaped cells. Secretion (mucous) and absorption. Surface lining of stomach and intestines.
nonliving, connects epithelial tissue to connective tissue
stratified squamous epithelium
thick membrane with several cell layers, surface cells can contain keratin. protects underlying tissues in areas that can be rubbed or injured
a type of tissue consisting of multiple layers of epithelial cells which can contract and expand.
cells that secrete fibers in connective tissue
cells in connective tissue that defend against
fibers and ground substance between connective tissue cells
areolar connective tissue
Connective Tissue that contains all three types of fibers, usually arranged in a disorderly fashion (found in the subcutaneous layers of the skin)
adipose connective tissue
beneath skin, around kidneys, stored energy, insulation, cushion joints
reticular connective tissue
Connective tissue that contains reticular fibers and cells; used to make the framework of major organs
dense regular connective tissue
Connective tissue made from collagen fibers that run in the same direction (makes tendons and ligaments)
dense irregular connective tissue
Connective tissue that is made from collagen fibers that are randomly arranged (found in fascia, heart valves)
space where cartilage and bone cells are found
white glass, joints, embryonic development, nose, most common type of cartilage. Beginning of bone. Found in the epiphysis of bone.
flexible, external ear
shock absorber, intervertebral discs, collagen fiber
liquid matrix, clotting, fights infection, transports gases
line joints, provide lubrication and mutrients
line cavities that do not open to the outside, reduce friction. Two types: viseral, parietal
lines cavities that open to the outside
made of epidermis and dermis
involuntary, lacks striations, around organs and blood vessels
voluntary, attached to bones, striated
found in the heart only, involuntary, striated
nervous tissue cells that transmit nerve impulses
specialized bands of tissue inserted between myocardial cells that increase the rate in which the action potential is spread from cell to cell.
gland that releases its secretions directly into the bloodstream
gland that releases its secretions through tubelike structures called ducts
found in loose c.t., form antibodies for immunity
projections that increase the cell's surface area
pseudostratified columnar epithelium
Epithelial tissue that only appears to be stratified. There is only one layer of cells, but there often appears to be two or more layers. This is because some of the cells are tall and reach the free surface, while others are short and do not reach the surface. These cells line certain glands and ducts, auditory tubes, the nasal cavity, and trachea. There is cilia located on the free surface of these cells.