Tissue Practical Flashcards
Describe Simple Cuboidal Epithelium and list functions and locations.
Description: Single layer of cube-shaped cells.
Function: Aids in secretion and absorption.
Location: Found in
follicles of thyroid gland, covers ovaries, lines kidney tubules and ducts of certain glands, and found where free surface faces the lumen.
Describe Simple Columnar Epithelium and list functions and locations.
Description: Single layer of wide cells (ciliated or nonciliated).
Function: Create thick tissue to protect underlying tissues, secrete digestive fluids, absorb nutrients during digestion.
Location: Extends from free surfaces of cells and moves constantly. Lines uterus and portions of digestive track.
Describe Bone and list functions and locations.
Description: Rigid connective tissue reinforced by more flexible collagenous fibers.
Function: Supports body structure, protects vital structures, forms blood cells, and stores/releases inorganic chemicals.
Location: All over the body.
Describe Stratified Squamous Epithelium and list functions and locations.
Description: Several layers of cells that create a thick tissue. Top layer is flattened, while deeper layers are cuboidal/columnar.
Function: Provides layer of dry, tough protective material to prevent water and other substances from escaping and chemicals and microorganisms from entering.
Location: Outermost layer of skin, oral cavity, esophagus, vagina, and anal canal.
Describe Blood and list functions and locations.
Description: Cells suspended in plasma.
Function: Red blood cells for transport, white blood cells for fighting infection, platelets for helping to clot blood.
Location: Red blood cells are in the blood vessels, while white blood cells migrate through capillary walls to connective tissue (where they reside until death).
Describe Stratified Columnar Epithelium and list functions and locations.
Description: Several layers of cells. Superficial are elongated, while deep are cube-shaped.
Function: Protection/secretion.
Location: Rare. Found in male urethra and lining of larger ducts of exocrine glands.
Describe Pseudostratified Epithelium and list functions and locations.
Description: Appears stratified/layered, but really nuclei are at multiple levels in a row of aligned cells. All cells vary in shape and reach basement membrane. Usually have cilia.
Function: Move particles/microorganisms trapped in music of airways up and out.
Location: Lines passages of respiratory system.
Describe Simple Squamous Epithelium and list functions and locations.
Description: Layer of thin, flattened cells that fit together like floor tiles.
Function: Provides thin layering that allows cells to easily pass through.
Location: Sites of fusion/filtration. Examples include lungs and the walls of capillaries.
Describe Loose (areolar) Connective Tissue and list functions and locations.
Description: Delicate, thin membranes. Usually further apart and separated by gel-like substance.
Function: Binds organs.
Location: Found in subcutaneous layer beneath skin and surrounding organs. Underlies most layers of epithelium.
Describe Adipose Connective Tissue and list functions and locations.
Description: “Fat droplet” that grows or shrinks depending on diet.
Function: Cushions joints, insulates beneath skin, stores energy.
Location: Beneath skin, between muscles, around kidneys, behind eyeballs, in certain abdominal membranes, on surface of heart, and around certain joints.
Describe Dense Connective (collagenous) Tissue and list functions and locations.
Description: Many closely packed, thick collagenous fibers. Has network of fine elastic fibers and a few cells (mainly fibroblasts).
Function: Allows tissue to withstand pulling forces.
Location: In tendons/ligaments surrounding joints.
Describe Elastic Connective Tissue (artery/vein) and list functions and locations.
Description: Consists of yellow, elastic fibers in parallel strands with collagenous fibers and fibroblasts between.
Function: Allows areas to have more elastic quality.
Location: Found in attachments between bones of spinal column, in layers within walls of certain hollow organs, and in larger airways.
Describe Smooth Muscle and list functions and locations.
Description: Short, spindle-shaped cells that lack striations and have a single, centrally located nuclei. Similar to dense connective tissue, but nuclei are more visible.
Function: Controls involuntary actions.
Location: Found in walls of hollow organs.
Describe Cardiac Muscle and list functions and locations.
Description: Cells are striated and branches, joined end-to-end, and interconnected in complex networks. Each cell has a single nucleus. Special junction where two cells meet is called an intercollated disc.
Function: Involuntarily pumps blood through heart chambers and into blood vessels.
Location: Found only in the heart.
Describe Leukemia and list functions and locations.
Description: Excessive number of white blood cells.
Function: Type of cancer in blood.
Location: Cardiovascular system.
