Epithelia tissues

• What is the tissue level?


  A group of cells that are similar in structure and function.
• Where are exocrine and endocrine glands usually found?

  Exocrine and endocrine glands are usually found in the tissue level.
• What are the three types of exocrine glands?

  The three types of exocrine glands are merocrine glands, apocrine glands, and holocrine glands.
• How do merocrine glands release fluid?

  Merocrine glands release fluid by exocytosis.
• What happens to the cell bodies of apocrine glands during secretion?

  The cell bodies of apocrine glands are lost during secretion.
• What happens to the entire cells of holocrine glands during secretion?

  The entire cells of holocrine glands release and disintegrate to release secretions.
• What is muscle tissue specialized for?

  Muscle tissue is specialized for contraction.
• What are the three types of muscle tissue?

  The three types of muscle tissue are skeletal muscles, the heart, and the muscular walls of hollow organs.
• What is nervous tissue specialized for?

  Nervous tissue is specialized for carrying information from one part of the body to another via electrical impulses.
• Where is nervous tissue found?

  Nervous tissue is found in the brain, spinal cord, and nerves.
• What are the functions of epithelial tissue?


  The functions of epithelial tissue are physical protection, permeability, sensation, and specialized secretions.
• What are the different shapes of epithelial cells?


  The different shapes of epithelial cells are squamous, cuboidal, columnar, and transitional.
• What shape are squamous cells?


  Squamous cells are flat, thin, and scale-like.
• What shape are cuboidal cells?

  Cuboidal cells are cubed.
• What shape are columnar cells?

  Columnar cells are taller than they are wide.
• What type of epithelium can stretch and change its appearance?

  Transitional epithelium can stretch and change its appearance to look like any of the other three types.
• What is simple epithelium composed of?

  Simple epithelium is composed of a single layer of cells.
• What is stratified epithelium composed of?

  Stratified epithelium is composed of two or more layers of cells.
• What is pseudostratified epithelium composed of?

  Pseudostratified epithelium is made up of epithelium that appears to have multiple layers but does not.
• What is membranous epithelium?

  Membranous epithelium lines the pleural, pericardial, and peritoneal cavities; respiratory, digestive, and genitourinary tracts; and blood and lymphatic vessels.
• What is glandular epithelial?


  Glandular epithelial consists of cells that produce and secrete substances into ducts or body fluids.
• What is the difference between exocrine and endocrine glands?


  Exocrine glands secrete substances into ducts or body fluids, while endocrine glands secrete substances into the bloodstream.
• What is the function of merocrine glands?

  Merocrine glands release fluid by exocytosis.
• What is the function of apocrine glands?

  Apocrine glands lose parts of their cell bodies during secretion.
• What is the function of holocrine glands?

  Holocrine glands release entire cells that disintegrate to release secretions.
• Epithelium is the tissue that lines body surfaces, cavities, and ducts.
• Epithelium is the tissue that lines all body cavities, covers all surfaces, and forms glands.