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Delgado, James Bryan G.
BioSci 1-B โ Bio 1133
Type Function Characteristics Structure Location
Epithelial
Squamou
s
Simple
โ Facilitates diffusion of gases and small molecules. โ Secretes lubricating substances โ Fast cell reproduction. โ Damaged easily โ Cells are large, thin, and flat and contain a rounded nucleus. โ Blood and lymphatic vessels, air sacs of lungs, lining of the heart.
Stratified โ^ Protection against abrasions.
โ Composed of many layers; only one layer is in contact with the basement membrane. โ Cells are flattened, joined tightly together and stacked in many layers. โ In areas that undergo wear-and-tear; skin, respiratory, digestive, excretory, and reproductive systems.
Cuboidal
Simple
โ Facilitates in absorption and secretion of substances โ Can withstand trauma โ Has a broad secretory and absorptive property โ Cells are cuboidal in shape, and contain a rounded nucleus. โ In ducts and secretory portions of small glands and in kidney tubules.
Stratified
โ Functions as a protective epithelial tissue. โ Creates an impermeable barrier between two distinct surfaces in the body. โ Barrier acts like a filter, forcing nutrients and water to pass through the cells โ Consists of cube shaped cells bound together by various membrane junctions. โ Found in sweat glands, salivary glands, and mammary glands.
Columnar Simple
โ Absorbs and secretes mucous and other enzymes โ Cilia in the tissues aid in the movement of mucus and reproductive cells. โ Microvilli in intestinal tracts provide large โ Cells are taller and less wide, placed side by side and the nucleus is situated near the base. โ Tissues with cilia; bronchi, uterine tubes, and uterus.
surface areas for maximum absorption. โ Tissues without cilia; digestive tract and bladder.
Stratified
โ Cells function in secretion and protection. โ Rare type of tissue โ Arranged in layers, where the topmost layer is made up on columnar epithelial cells. โ Found in parts of the pharynx, anus, the uterus, and the male urethra and vas deferens.
Muscular
Unstriated
โ Manages peristalsis, blood pressure, pupil size.
โ Involuntary muscle
tissues that are
arranged in layers.
โ Smooth muscle
tissues.
โ Elongated, spindle-shaped
fiber with single nucleus.
โ Walls of the internal organs, such as the stomach, intestine, bladder, and blood vessels, excluding the heart.
Striated
โ Allows that generation of force and contract in order to support respiration, locomotion, and posture. โ Appears transversely striped, with alternating dark and light bands. โ Skeletal muscle tissues. โ Fibers are cylindrical and multinucleated. โ Spanning joints of skeleton via tendons.
Cardiac
โ Performs coordinated contractions that allow the heart to pump blood. โ Heart muscle tissues. โ Only found in the heart. โ Very vital. โ Branched, striated fiber with single nucleus and intercalated discs โ Found in the walls of the heart.
Connectiv
e
Proper
Dense
โ Joins bones together โ Resists stretching. โ Mostly made up of collagen, a protein that provides flexibility. โ Made up of strong, densely packed collaged fibers that are arranged parallel to each other. โ Ligaments, tendons, and aponeurosis.
found in every part of your body.
Lymph
โ Helps in fighting infections in the body. โ Fluid, leukocytes are dominant. โ Consists of mostly plasma and various types of leukocytes. โ Found in the intracellular fluids that are spread throughout the body.
Nervous
Neurons
โ Receive stimuli and send the impulses to the spinal cord and brain. โ Nerve cells live long, cannot be divided and replaced. โ Consists of a nerve cell body and several processes: dendrites, which carry impulses toward the nerve cell body, and axons, which carry impulses away from the cell body. โ Found in the central nervous system; spinal cord, brain, nerves.
Neuroglia
โ Supports and protects the neurons. โ Smaller than neurons and are about three times more numerous in the nervous system. โ Do not have axons, dendrites, or conduct nerve impulses.
