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Pregunta | Respuesta |
Gap Junction | allows communication between cells Eg. Epithelial Tissue |
Adhesive Junction | for anchoring cells/cell adhesion Eg. Hemidesmosome, Adherens junction, desmosome |
Tight Junction | barrier function ie. prevent the passage of molecules and ions through the space between plasma membranes of adjacent cells |
Epithelial tissue | covers and protects surfaces, both outside and inside the body cell and matrix connections, nonvascular, capable of regeneration |
Fuinctions of Epithelial tissue | Protecting underlying structures Acting as a barrier Permitting the passage of substances Secreting substances (glands) |
Merocine Gland | mero = partial The gland releases its product and no part of the gland is lost or damaged |
Apocrine Gland | apo = away from secretion by membrane budding (loss of cytoplasm) portion of the cell containing secretory products is pinched off |
Holocrine Gland | holo = whole; complete entire cells are shed by the gland and become part of the secretion |
Squamous | FLAT, hexagonal, scale-like Found in skin, inner cheek |
Cuboidal | cube-like Found in kidney |
Columnar | Rectangular, pillars, columns Found in the stomach |
Simple (Layer) | Single layer |
Stratified | Multiple layers |
Pseudostratified | Appears to be multi-layer but the arrangement of cells are still simple (single) |
Transitional (Layer) | Cells of the basal layer are cuboidal, or cube-shaped, and columnar, or column-shaped, while the cells of the superficial layer vary in appearance depending on the degree of distension. |
Simple Squamous Epithelium | Function: reduces friction, gaseous exchange, diffusion hotspots, filtration, secretion & absorption Characteristics: flat, tightly packed, nucleus is spherical/disk shaped, single layer Location: Alveoli, blood vessels, lymphatic vessels |
Stratified Squamous Epithelium | Specialized in areas with high abrasion Can be keratinized or not Location: Mouth, vagina, tongue, anal canal, skin |
Simple Columnar Epithelium | basal nuclei all in one line, elongated cell, single layer Location: stomach lining, gallbladder, collecting ducts of kidneys, intestine, uterine tubes |
Stratified Cuboidal Epithelium | multiple layers of cube-like cells Location: Sweat glands, Salivary gland ducts Functions: Secretion, absorption, protection against infection |
Stratified Columnar Epithelium | Function: protection, secretion Location: lanryx, mammary gland ducts |
Pseudostratified Columnar Epithelium | Brush-like surface for cilia Function: protection & secretion |
Simple Cuboidal | Characteristics: Cells are cube shaped, usually as a lining for ducts thus the presence of lumen Function:Secretion and absorption Location: Kidney ducts, thyroid, other glands, etc. |
Adipose | Function: Energy storage, insulation, cushioning, contains lipids (fats) Location: deep in skin, buttocks, breasts |
Loose Connective | Connects several tissues together Location: digestive tract, blood vessels, joints |
Dense Connective | Connects bones/muscles Found in ligaments and tendons |
Bone | Structural support, immune function (marrow) |
Hyaline Cartilage | hyaline = having a glassy, translucent appearance provides flexible support reduces friction Commonly found in joints for support |
Elastic Cartilage | Great flexibility Location: epiglottis, auricle of external ear |
Fibrous Cartilage | Strong cartilage usually for high tension areas Location: pads within knee joint, intervertebral discs |
Blood | Immune function (leukocytes) Nutrient and oxygen transport (erythrocytes) Clotting (thrombocytes) |
Skeletal Muscle | Striated, multinucleated Voluntary Attached to bones, found in tongue |
Smooth Muscle | Fusiform/spindle shaped Involuntary, unstriated Multiple functions: Lines vascular tissue, lines GI tract Found in visceral organs: stomach, small intestine |
Cardiac Muscle | Found in the heart Striated; involuntary Intercalated disc: force muscle contraction |
Nervous tissue | Function: Sensory input, Controls muscles and glands, Homeostasis (balance), Mental activity Location: Brain, spinal cord, nerves |
Burns | |
Tissue Damage and Repair |
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