Tissues Chapter 5 Intro Tissues are groups of
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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 • 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.
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
• 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.
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
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.
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.
• Bone: most rigid connective tissue; well supplied with blood which allows rapid healing. • Plasma: red blood cells, white blood cells, and platelets.
MUSCLE TISSUE • Skeletal: muscle that attach to bone; controlled voluntarily. • Smooth: digestive tract, urinary bladder, blood vessels; controlled involuntarily. • Cardiac: heart muscle; controlled involuntarily.
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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