Tissue
Group of cells found together in the body, sharing a common origin and features, arranged in an orderly pattern that creates function.
Histology
Study of tissue structure, organization, and function.
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Tissue
Group of cells found together in the body, sharing a common origin and features, arranged in an orderly pattern that creates function.
Histology
Study of tissue structure, organization, and function.
Connective tissue
Binds cells and organs together for protection and support.
Epithelial tissue
Cells that cover external surfaces and internal cavities.
Nervous tissue
Propagates and transports communication throughout the body.
Muscle tissue
Responsive to stimulation and provides movement.
Mucous (epithelial tissue)
Membranes that line tracts exposed to the external environment; covered with mucous.
Serous (epithelial tissue)
Membranes that line cavities closed to the external environment.
Cutaneous (epithelial tissue)
"Dry," covers the body surface.
Synovial (epithelial tissue)
Lines joint cavities and produces fluid inside the joint; connective tissue.
Common structural features of epithelial tissue
Highly cellular, little extracellular material; apical surface, basement membrane, nearly completely avascular.
Squamous description
Outside of nucleus is squashed (flat).
Cuboidal description
Outside of nucleus are equal around (like a cube).
Columnar description
Outside of nucleus is like a column.
Simple squamous epithelium
Location-- heart, blood vessels; Function-- allows materials to pass through by diffusion and filtration.
Stratified squamous epithelium
Location-- lines the esophagus, mouth; Function-- protects against abrasion.
Simple columnar epithelium
Location-- ciliated tissues in bronchi; Function-- absorbs and secretes mucous and enzymes.
Stratified columnar epithelium
Location-- male urethra; Function-- secretes and protects.
Simple cuboidal epithelium
Location-- in ducts and secretory portions of small glands; Function-- secretes and absorbs.
Stratified cuboidal epithelium
Location-- sweat glands; Function-- protective tissue.
Pseudostratified columnar epithelium
Location-- lines the trachea; Function-- secretes mucus; ciliated tissue moves mucus.
Functions of connective tissue
Connects body parts; protects, supports, and binds other tissues together.
Bone
Bone cells in lacunae, surrounded by a hard matrix of calcium salts and collagen fibers; protects and supports.
Dense connective tissue
Mostly collagen fibers with rows of fibroblasts.
Tendons
Connect muscle to bone.
Ligaments
Connect bone to bone.
Loose connective tissue
Softer, more cells, less fibrous than other connective tissues.
Areolar tissue
Most widely distributed loose connective tissue; holds organs together.
Adipose tissue
Fat; insulates the body from extreme heat and cold.
Reticular connective tissue
Forms internal framework for blood cells and lymphatic organs.
Blood
A tissue consisting of blood cells surrounded by blood plasma; atypical connective tissue.
Hyaline cartilage
Contains collagen fibers; covers ends of bones and forms larynx.
Fibrocartilage
Highly compressible; found between vertebrae discs.
Elastic cartilage
Provides elasticity; found in external ear and nose.
Extracurricular matrix
Non-living substance that makes up connective tissue; produced by connective tissue and then secreted to the exterior.
made up of--Structureless ground substance - “glue” that keeps the tissue together AND Fibers - collagen, elastic, and reticular fibers
forms a soft packing tissue around other organs, bears weight, and can withstand stretching and abrasion
ranges from fat tissue to bones and cartilage