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Four Types of Animal Tissues

Four Types of Animal Tissues. Epithelial Tissue (Covering). Tightly-joined closely-packed cells One side of epithelium exposed to air or internal fluid, other side attached to a basement membrane , a dense mat of extracellular matrix (connective tissue)

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Four Types of Animal Tissues

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  1. Four Types of Animal Tissues

  2. Epithelial Tissue(Covering) • Tightly-joined closely-packed cells • One side of epithelium exposed to air or internal fluid, other side attached to a basement membrane, a dense mat of extracellular matrix (connective tissue) • Covers the outside of the body and lines the internal organs and cavities • Barrier against mechanical injury, invasive microorganisms, and fluid loss • Provides surface for absorption, excretion and transport of molecules

  3. Types of Epithelial Tissue • Cell shape • Squamous • Cuboidal • Columnar • Number of cell layers • Simple • Pseudostratified • Columnar • RELATE STRUCTURE TO FUNCTION!

  4. Connective tissue(Framework) • Main function: binding and support other tissues • Large amount of extra-cellular matrix with fewer cells • Connective tissue cells secrete the extra-cellular matrix • Extracellular matrix consists of network of fibers in liquid, jelly-like or solid matrix

  5. Muscle Tissue(Movement) • Composed of long cells called muscle fibers • Contraction  movement

  6. Nervous tissue(Control) • Senses stimuli and transmits signals called nerve impulses from one part of an animal to another • Consists of a cell body and long extensions called dendrites (towards cell body) and axons (towards another cell or an effector) Axon Dendrite Cell body

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