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4 Types of tissues: Epithelia, Connective, Muscle and Nervous.

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Term
Definition
Epithelia Tissue composition   tightly packed cells with minimal extraceullar matrix  
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Epithelia Tissue Functions   Covers body and organ surfaces, lines body and organ cavities , forms some glands  
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Connective Tissue Composition   contains cells, protein fibers and ground substance  
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Connective Tissue Functions   Binds, supports and protects other tissues and organs  
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Muscle Tissue Composition   cells that may be spindle-shaped, branching or cylindrical, contains myofilaments.  
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Muscle Tissue Functions   moves the skeleton or organ walls  
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epithelial apical surface   free superficial layer which is exposed to external environment or to some internal body surface  
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epithelial basal surface   fixed/deep surface were epithelium is attached to underlying connective tissue  
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basement membrane molecular levels:   lamina lucida, lamina densa, reticular lamina  
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epithelial avascularity   lack blood vessels. Nutrients are obtained directly across apical surface or diffusion across the basal surface from blood vessels within the underlaying connective tissue.  
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functions of epithelial tissue   Physical protection: protect surfaces from dehydration, abrasion, destruction Selective Permeability: all substances pass through epithelium Secretions: some specialized to produce and release secretions Sensation: has sensory nerve endings  
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Three shapes of epithelial cells   squamous, cuboidal, columnar  
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three components of connective tissue   cells, protein fibers, ground state  
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Fibroblasts   connective tissue, resident cells, most abundant resident cells in connective tissue proper. Produce fibers and ground substance  
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Mesenchymal cells   connective tissue, resident cells. embryonic stem cells within connective tissue, when tissue becomes damaged, the cells will divide  
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Adipocytes   connective tissue, resident cells, fat cells, appear in small clusters within some types of connective tissue proper.  
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Fixed Macrophages   connective tissue, resident cells, large irregular shaped, dispersed throughout matrix, phagocytize damaged cells or pathogens. Stimulate immune systems and attract numerous wandering cells to the tissue.  
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Mast cells   connective tissue, wandering cell, found close to blood vessels, secrete heparin to inhibit blood clotting and histamine to dilate blood vessels and increase blood flow (inflammatory response)  
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plasma cells   connective tissue, wandering cell, formed when B-lymphocytes are activated by exposure to foreign materials, produce antibodies  
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Free Macrophages   connective tissue, wandering cell, mobile phagocytic cells that wander  
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Neutrophils   connective tissue, wandering cell, a type of leukocyte that phagocytize bacteria  
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lymphocytes   connective tissue, wandering cell, a leukocyte which attacks foreign materials  
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Collagen Fibers   connective tissue, protein fiber, unbranched cable like long fibers that are strong, flexible and resistant to stretching. Forms about 25% of bodies protein.  
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Reticular Fibers   connective tissue, protein fiber, branching interwoven framework that is tough but flexible. Abundant in the stroma (connective framework) of organs such as lymph nodes, liver and spleen.  
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Elastic Fibers   connective tissue, protein fiber, contain elastin. Elastic fibers stretch and recoil easily (yellow fibers) Abundant in skin, arteries and lungs, allows them to return to their normal shape after being stretched.  
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Ground substance   forms the extracellular matrix with the protein fibers.  
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Glycosaminoglycans   connective tissue, ground substance, polysaccharide that is composed completely of carbohydrate building blocks. GAGs are able to attract and absorb H2O  
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Functions of Connective Tissue   physical protection, support and structural framework, binding of structures, storage, transport, immune protection/response  
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simple squamous   rapid diffusion, filtration, secretion in some serous membranes; air sacks in lungs, lining vessels and nodes, serous membrane lining  
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simple cuboidal   absorption and secretion, forms glands and small ducts; thyroid glands follicles, surface of ovary, kidney tubules, secretory regions of ducts of most glands  
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nonciliated simple columnar   contain goblet cells, absorption and secretion of mucin; lines digestive tract  
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ciliated simple columnar   secretion of mucin and movement of mucus along apical surface by cilia; lining of bronchioles in respiratory tract, uterine tubes  
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ciliated pseudo stratified columnar   contain goblet cells, used for protection, also involved in movement of mucus across surface; Lining of larger air ways in respiratory tract: nasal cavity, pharynx, larynx, trachea, bronchi  
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nonciliated pseudo stratified columnar   protection; rare, lining parts of male urethra and epididymis  
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Keratinized stratified squamous   apical cells are dead and filled with keratin, used for protection of underlying tissue from abrasion; epidermis of skin  
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nonkeratinized stratified squamous   apical cells are alive , used for protection from abrasion; lining of oral cavity, part of pharynx, esophagus, lining of vagina and anus  
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stratified cuboidal   protection and secretion; ducts of most endocrine glands, some regions of male urethra and ovarian follicles  
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stratified columnar   protection and secretion; large ducts of salivary glands and membranous part of male urethra  
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transitional epithelium   distension (stretching) to accommodate volume changes in urine related organs; lining of urinary bladder, ureters, and parts of urethra  
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Areolar connective tissue   Connective tissue proper; loose connective tissue (viscous GS, fibroblasts) protects organs, binds skin and some epithelium to deeper tissue; papillary layer of dermis, subcutaneous layer, surrounds organs, nerves, some muscle cells and blood vessels  
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adipose connective tissue   CT proper, Loose CT (adipocytes, many blood vessels) stores energy, insulated, cushions and protects found in subcutaneous layer, surrounds and covers some organs  
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reticular connective tissue   CT Proper, Loose CT (viscous GS, reticular fibers, leukocytes, fibroblasts)  
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dense regular connective tissue   CT Proper, Dense CT (collagen fibers, fibroblasts,reduced blood supply) attached bone to bone, muscle to bone, resists stress applied in one direction Tendons, ligaments  
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Dense irregular connective tissue   CT Proper, Dense CT (collagen, fibroblasts, more GS than regular CT, extensive blood supply; withstands stress applied in all directions most of dermis of skin, periosteum covering bone, perichondrium covering cartilage, some organ capsules  
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Elastic connective tissue   CT Proper, Dense CT (elastic fibers, fibroblasts) allows for stretching and recoiling; walls of elastic arteries (aorta), trachea, vocal cords  
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Hyaline cartilage   Supporting CT , Cartilage (irregularly arranged chondrocytes in lacunae, usually covered by perichondrium) Provides support; forms most fetal skeleton; Tip of nose, trachea, larynx, costal cartilage, articular ends of long bones  
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Fibrocartilage   Supporting CT, Cartilage (parallel collagen fibers, large chondrocytes in lacunae, no perichondrium) Resists compression, shook absorber in some joints; intervertebral discs, pubic symphysis. menisci of knee joints  
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Elastic cartilage   Supporting CT, Cartilage (elastic weblike mesh, chondrocytes in lacunae, perichondrium present) Maintains shape while permitting extensive flexibility; External ear; epiglottis of larynx  
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Bone   Supporting CT (calcified extracellular matrix with osteocytes in lacunae, bone arranged in osteons, spongey is a meshwork) Spongy bones contain hemopoietic tissue and it the site for hemopoiesis; bones of body  
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Blood   Fluid CT (erythrocytes, leukocytes, platelets, proteins dissolved in plasma) erythrocytes transport gases, leukocytes help protect from infectious agents, platelets and proteins clot, plasma transports  
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Mesenchyme   Embryonic CT (GS is viscous with immature protein fibers, mesenchymal cells are stellate or spindle-shaped) Origin for connective tissues; In embryo and fetus  
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Mucous CT   Embryonic CT (mesenchymal cells scattered within viscous GS; immature protein fibers very abundant) Supports structure in umbilical cord  
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