Tissue Webquest http://www.mhhe.com/biosci/esp/2002_general/Esp/default.htm Within the Essential Study Partner - GO TO: Levels of Organization -> Tissues -> Introduction In the top left corner of the “Essential Study Partner” screen, click “Click here to choose a unit.” – and a drop down menu should appear showing “Levels of Organization,” “Support and Movement” etc. Click on “Levels of Organization” Next Click on “Tissues” – and another drop down menu should appear – “Introduction” “Epithelial Tissue” Etc. Click on “Introduction” and you should see a picture of some lungs and the respiratory system. At the bottom of the screen are icons that represent pages within this section. There is an icon that looks like a “page” and two that have arrows associated with them. Click on these icons to move between the 5 pages that are associated with the Introduction section of the Histology unit. Most of the time, no page number will be given and you’ll have to hunt a bit between the different pages. You are now ready to begin your quest for information about tissues of the body!! Part 1 – Introduction Throughout the semester, we will look at pictures of organs, such as a brain or a heart, and then point to a specific section of the image and ask, “What general tissue type is this?” When the question “What GENERAL tissue type is this” arises, you only have four options 1. What are the four tissue types and where might they be found? 2. What is a tissue? 3. What is histology? (you may need to refer to your book for this answer) 4. What is extracellular material (also called matrix). Part 2 - Epithelial Tissue Epithelial tissue is classified according to two different systems: First, the shapes of the cells, e.g., squamous, and second, the arrangements of the cells, i.e. simple, stratified, or pseudostratified. Combining these two systems you get terms such as "simple squamous epithelium" or "stratified squamous epithelium." 5. What are the functions of epithelial tissue? 6. Epithelial tissues cover internal and external surfaces. True / False Explain. 7. The lining of the stomach (a common example of a hollow organ) is made of epithelial cells. True / False Define: 8. Basement membrane 9. Free surface (Note: there is a free surface in your stomach, and many other hollow organs, like your bladder, heart, etc) 10. Make a drawing of each cell/tissue type and provide an example location. Simple Squamous Epithelium Simple Cuboidal Epithelium Drawing Drawing Example Location Example Location Simple Columnar Epithelium Pseudostratified Columnar Epithelium Drawing Drawing Example Location Example Location Stratified Squamous Epithelium Stratified Cuboidal Epithelium Drawing Drawing Example Location Example Location Stratified Columnar Epithelium Transitional Epithelium Drawing Drawing (This one is difficult to draw) Example Location Example Location 11. What is the difference between simple, stratified, and pseudostratified epithelium? Try to make a drawing of each tissue type. Simple Epithelium Stratified Epithelium Pseudostratified Epithelium 12. What is the difference between Columnar, Squamous and Cuboidal arrangement of epithelial cells? Try to make a drawing of type of arrangement. Columnar Squamous Cuboidal 13. List a few other “surfaces of the body” that are covered with Epithelial tissues. 14. What is function of microvilli and cilia? Where can they be found (give examples)? 15. What are goblet cells? 16. What is a gland? 17. What is the difference between an exocrine and an endocrine gland? Part 3 Connective Tissue Connective tissue typically has large quantities of extracellular materials, such as collagen and elastin. 18. What is the difference between a “blast,” “cyte” and a “clast” cell? 19. What is the function and location of the following connective tissues? Adipose tissue Cartilage (hyaline, fibro and elastic cartilage) Bone Blood 20. What is the matrix of blood? Part 4 Nervous Tissue 21. Name a few organs that contain nervous tissue. 22. What is the difference between a neuron and a neuroglia cell? Part 5 Muscle Tissue Muscle tissue can essentially do only two things: it can contract and it can relax. Muscle tissue will be examined in detail later in the course, but for now, answer the following simple questions about muscles. 23. What are the three types of muscle tissue and where can each be found? 24. Skeletal muscle makes-up over 50% of a person’s body weight. True / False 25. Smooth muscle can be found in the walls of hollow organs. True / False 26. Besides the heart, cardiac muscle can also be found in the liver. True / False 27. What are intercalated discs? 28. In which muscle type can you find intercalated discs? Be sure to do the activities on the last two screens. Part 5 Membranes Review the structure of serous membranes (Serous membranes was initially covered in Chapter 1 of the textbook). 29. What are Serous membranes and where in the body can they be found? 30. Watch the movie in screen 3 Part 6 The Quiz Turn in your computer. You must work alone but you may use you’re your book & your webquest packet. Pick up your quiz at the front of the class – Everything is due at the end of class today. Name ______________________________________ Date _______ Per _______ Tissue Webquest Quiz Identify the tissues on microscopes 1-5 1. 2. 3. 4. 5. Epithelial Tissues In a brief sentence, explain how epithelial tissues are named. What type of epithelial cells can stretch? Where can you find them in your body? What are the seven characteristics of epithelial cells? Connective Tissues What is the matrix of blood called? Blood is a tissue, more specifically, a connective tissue. True/False Nervous Tissue What is the difference between a neuron and a nerve? Muscle Tissue Name the three different types of muscle tissue. Explain how are they different from each other? Matching Options 1 ___ The outer layer of skin 8 ___ Tendons A. Epithelial Tissue 2. ___ Heart 9. ___ Blood B. Connective Tissue 3. ___ Lines your stomach. 10. ___ Spinal cord C. Nerve Tissue 4. ___ The jaw bone 11. ___ Lots of matrix (think!) D. Muscle Tissue 5. ___ Brain 12. ___ Cartilage 6. ___ Ligaments 13. ___ Glands 7. ___ Lines the bladder. 14. ___ Biceps and Quadriceps BONUS! What causes human skin to sag?