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Tissues

Tissues. Chapter 5. Intro. Tissues are groups of similar cells that are specialized to carry out a particular function. Epithelial Tissues. Protection Secretion Absorption Excretion Sensory reception. Basement membrane.

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Tissues

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  1. Tissues Chapter 5

  2. Intro • Tissues are groups of similar cells that are specialized to carry out a particular function.

  3. Epithelial Tissues • Protection • Secretion • Absorption • Excretion • Sensory reception

  4. Basement membrane • Thin, non-living layer that anchors epithelial tissue to connective tissue. • Nutrients for epithelial tissue diffuse through the basement membrane to epithelial tissue as this tissue usually has few if any blood vessels.

  5. Location of Epithelial Tissue • Covers ovaries and lines salivary glands, pancreas, thyroid gland, and liver: provides for secretion and absorption. • Fallopian tubes, uterus, digestive tract organs: provides for secretion of mucus and absorption. • Passages of respiratory tract

  6. Forms epidermis (outer layer of skin): produces keratin to waterproof the skin. • Lining of urinary bladder: changes in response to increased pressure • Mammary glands, external ear canal, sebaceous glands in skin: secretes glandular products.

  7. Connective Tissue • Binds structures together, provides support and protection, serves as frameworks, fills spaces, stores fat, produces blood cells, protects against infections, and helps repair tissue damage. • Examples: macrophages, collagenous fibers, ligaments, tendons, adipose tissue, cartilage, bone, plasma

  8. Types of Cartilage • Hyaline: supports and cushions ends of bones in joints, tip of nose, supporting rings of respiratory passages • Elastic: provides framework for external ears and part of the larynx • Fibrocartilage: forms pads between the bones of spine, cushions bones in knee and pelvic girdle.

  9. More Connective Tissue • Macrophages: originate as white blood cells; specialized to carry on phagocytosis. • Ligaments: hold bones to bones. • Tendons: hold muscle to bone. • Adipose tissue: cushions joints and organs, insulates the body, and stores energy in fat molecules.

  10. Bone: most rigid connective tissue; well supplied with blood which allows rapid healing. • Plasma: red blood cells, white blood cells, and platelets.

  11. MUSCLE TISSUE • Skeletal: muscle that attach to bone; controlled voluntarily. • Smooth: digestive tract, urinary bladder, blood vessels; controlled involuntarily. • Cardiac: heart muscle; controlled involuntarily.

  12. NERVOUS TISSUE • Neuron: • Supports and binds nervous tissue • Carries on phagocytosis • Carries nutrients to nerve cells. • Provides for coordination, regulation, and integration of body functions.

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