ANT 2100 1st Edition Lecture 3I. Tissues Epithelial tissues covers and lines hollow organs and tubes in the body a. Cells are unicellular b. Cells have high mitotic rate c. Tissue is avascular d. Tissue is innervated II. How tissues are classified a. Simple: 1 layer b. Stratified: More than one layer III. Cell Shapes 1. Squamous a. cells are flat or squished b. nucleus appears flat in cell 2. Cuboidal a. cells are cube shapedb. cells are as tall as they are wide c. nucleus is round and in the center of the cell 3. Columar a. column cube shaped b. cells are taller than they are wide c. nucleus is ova IV. Types of Epithelium These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.1. Simples squamous epitheliuma. specialized for filtration or diffusionb. one layer of very thin cells c. found in places where chemicals need to move quickly (ex. Lungs) d. the cells can act as a filter for substances passing through 2. Simple cuboidal epithelium a. specialized for secretion and absorption b. tubes of the body are made up of this tissue (ex. Kidneys) 3. Simple columnar epitheliuma. specialized for absorption and secretion b. found in digestive tract c. some areas contain special gobet cells d. these cells produce mucus4. Pseudostratified columnar ciliated epithelium a. Single layer of cell with nuclei found at many different levels b. work in secretion and movement of substances over the surface of the cell c. contain goblet cell and cilia d. found in respiratory tract 5. Stratified squamous epithelium a. protects underlying tissues because of its many layers b. found in skin (makes up epidermis) 7. Transitional epithelium a. allows for stretching and so changes its shaped (can changed from one shaped to another) b. found in bladder, uterus, and parts of the urethra7. Glandular epithelium a. the cells are specialized to secrete a substanceb. endocrine secrete their substance (hormones) directly into the blood stream (do not useducts)c. exocrine secrete their substances into ducts which empty onto a free surface of the skinor into a hollow surface of an organ (ex.