The Albert Einstein’s presents…

Epithelial TissueSimple squamous- composed of a single layer of flattened cells each with a somewhat flattened nucleus.

Location: found in the alveoli of lungs, lining of blood and lymphatic vessels.

Function: absorption by diffusion of respiratory gasses between alveolar air and blood.

GlandularLocation: glands. Function: secretion.

Epithelial Tissue Cont.

Stratified squamous- consists of multiple layers of cells with the surface cells flattened and the deeper cells cuboidal.

Location: surface of mucus membrane lining mouth, esophagus, and vagina, surface of skin. Function: absorption by diffusion of respiratory gasses between alveolar air and blood.

Epithelial TissueTransitional- consists of two or more layers of cells with the basal cells being mostly cuboidal and surface cells varying size.

Location: surface of mucus membrane lining the urinary bladder and ureters.

Function: permits stretching.

Simple columnar- composed of a single layer of tall, thin cells.

Location: surface layer of mucus lining of stomach, intestines, and part of the respiratory tract. Function: protection; secretion; absorption; moving of mucus.

Cont.

Epithelial Tissue Cont.

Stratified columnar- consists of two or more layers of cells, typically with columnar surface cells resting upon cuboidal basal cells.

Location: lining of portions of the male urethra; mucous membrane near anus. Function: protection.

Pseudostratified- frequently contain goblet cells and cilia. Appears stratified because the nuclei are staggered and appear at many levels.

Location: surface of mucous membrane lining the trachea, large bronchi, nasal mucosa, & large parts of the male

reproductive tract; lines large ducts of some glands.

Function: protection.

Epithelial TissueCont.

Simple cuboidal- consists of a single layer of cells squarish in profile.

Location: ducts and tubes of many organs, including exocrine glands and kidneys.

Function: secretion; absorption.

Stratified cuboidal- consist of two or more layers of cuboidal cells.

Location: ducts of sweat glands; lining of pharynx; covering portion of epiglottis.

Function: protection.

Skeletal- composed of muscles attached to bones. These are the organs that we think of as our muscles.

Characteristics: many cross striations, many nuclei per cell. Long narrow threadlike shape of the cells. Length of more than 3.75 cm, but has a diameter of only 10 to 100 u.m.

Location: attached to bone. Function: initiation of body

movement and locomotion.

Cont.

Smooth- sometimes called Visceral muscle tissues. Long narrow fibers but not as long as striated fibers.

Location: found in the walls of the viscera (hollow internal organs e.g., the stomach, intestines, and blood vessels.

Function: movement of substances through an organ; regulates vessel diameter.

Cont.

Cardiac- also called striated voluntary muscle; makes up the wall of the heart. Cardiac tissue consists of cross striations and unique dark bands. The cells are shorter, branched, and each cell has one nucleus that is centrally located and are joined end to end by junctions called intercalated discs.

Location: heart. Function: contraction of heart.

Consists of neurons (nerve cells) and neuroglial cells. Neurons are specialized to transmit electrical signals and contain 3 principal parts: the soma, dendrites, and one axon (or nerve fiber).

Location: brain, spinal cord, and peripheral nerves.

Function: detect stimuli, respond, and transmit information to other cells.

Reticular- consists of branching fibers and fibroblasts.

Location: stroma of spleen, liver, lymph nodes, and thymus

Function: support

Dense Regular- consists of closely packed parallel collagen fibers and fibroblasts interspersed between the fibers.

Location: tendons; ligaments. Function: strong support.

Cont.

Dense Irregular- similar to dense regular except that the collagen fibers do not exhibit a consistent pattern.

Location: dermis; sheaths around bones, nerves and cartilages. Function: strong support.

Adipose- consists of adipocytes, which store fat droplets.

Location: subcutaneous region, bone marrow, and mesenteriesFunction: lipid storage;

thermoregulation; protection.

Cont.

Hyaline Cartilage- contains chondrocytes in lacunae and a matrix of fine collagen fibers that are not visible.

Location: fetal skeleton; covering of bones at joints; end of ribs Function: flexible support

Elastic Cartilage- contains chondrocytes in lacunae and a matrix of collagen fibers with elastic fibers randomly oriented.

Location: outer ear; epiglottis; Eustachian tube

Function: flexible support

Cont.

Fibrocartilage- consists of parallel fibers of collagen fibers with chondrocytes in lacunae interspersed.

Location: intervertebral discs; pubic symphysis Function: firm support

Compact bone- dense calcified tissue with no spaces visible to the naked eye.

Location: outer surface and shaft of bone.Function: support.

Cont.

Blood- liquid connective tissue that travels through vessels. Consists of a liquid matrix called plasma, cells, and cell fragments referred to as formed elements.

Location: within blood vessels, bone marrow, blood sinuses.

Function: transportation, immunity.

Loose FibrousLocation: beneath skin, between

muscles, beneath epithelial tissuesFunction: binds organs together,

holds tissue fluids