Lab 4: The Integumentary System

During the lab period (do #1 first, the rest can be done in any order):

1. Perform the experiment described in Activity 5 on p. 99 of the Lab Manual.
   • This experiment will have you develop and test a hypothesis about the relative distribution of sweat glands on the palm and the forearm.
   • Answer the questions on the Lab 4 Report.
     • This can be turned in once you’re finished; there’s no need to bring this home as homework.
2. Become familiar with the skin models and try to identify the following:
   • stratum corneum
   • stratum lucidum
   • stratum granulosum
   • stratum spinosum
   • stratum basale
   • dermal papillae
   • papillary layer
   • reticular layer
   • hypodermis
   • sebaceous gland
   • eccrine sweat gland
   • hair shaft
   • hair follicle
   • hair root
   • epidermis
   • dermis
3. For your Histology Notebook:
   • Serous membrane – Brief Atlas: Plate 44 (p. 18)
     • Recommended # of pages: 1
     • Draw at 400x total magnification.
     • Label the following: free edge, epithelial cell
     • Answer the following questions:
       • Question 4: What type of epithelium comprises this membrane?
       • Question 5: In general, where in the body do you find serous membranes?
   • Mucous membrane – Brief Atlas: Plate 45 (p. 19)
     • Recommended # of pages: 1
     • Draw at 400x total magnification.
     • Label the following: free edge, epithelial cell, goblet cell
     • Answer the following questions:
       • Question 6: What type(s) of epithelium comprise(s) this membrane?
       • Question 7: In general, where in the body do you find mucous membranes?
   • Thick skin (usu. palm or sole of primate) – Brief Atlas: Plate 37 (p. 15); Histology Atlas: Figs. 12.4 & 12.5 (p. 119).
     • Recommended # of pages: 1-2
     • Draw at 100x total magnification.
     • Label the following: stratum corneum, stratum granulosum, stratum spinosum, stratum basale, dermal papillae, sweat gland, hypodermis, epidermis in general, dermis in general
     • Answer the following questions:
       • Question 8: Identify the major tissue types of the epidermis, dermis and hypodermis.
       • Question 9: List the places on the body where you find thick skin.
   • Thin skin (usu. scalp or axillary skin with hair) – Histology Atlas: Fig. 12.8 (p. 120), Fig. 12.11 (p. 121).
     • Recommended # of pages: 1-2
     • Draw at 100x total magnification.
     • Label the following: stratum corneum, stratum granulosum, stratum spinosum, stratum basale, dermal papillae, hypodermis, sebaceous gland, hair follicle, hair root, epidermis in general, dermis in general
     • Answer Question 10: What is the secretory product of the sebaceous gland?

By the next lab:

1. Continue with Part 3 of the System Assignment for tissues.
2. Continue the process of learning the terms that deal with regional anatomy (“Naked Man” – Marieb Figure 1.7; p. 14).
   
   • Pick 11 more terms on the anterior view and 7 more on the posterior view, and learn those.
3. Look over the Lab Exam 1 Review Sheet to see what you’re responsible for regarding the bones.
   
   • Next week’s lab will be dedicated to the axial skeleton.
   • You should look over the names of the bones before coming into lab.