Module 2 Lab.pdf | bartleby

1 Module 2 Lab Name: Megan Scheidel Part 1: The Skin The skin is also known as the Integumentary System. Use your text to help you as you study the slides and models. Skin Model Using the skin model, find the following structures: 1. Epidermis 2. Dermis 3. Hypodermis 4. Hair follicles 5. Arrector pili muscle 6. Sebaceous gland 7. Meissner’s corpuscle 8. Pacinian corpuscle (Lamellar corpuscle) 9. Sweat glands (apocrine and eccrine) 10. Adipose tissue Skin Model – 3 sections Obtain the skin model with different sections. 1. Compare and contrast (describe similarities AND differences) the tissue samples of skin and scalp. The scalp has much more visible hair follicles and sebaceous glands. The skin has those features less visible, with the striations of the dermis being the most prominent feature. 2. Compare and contrast (describe similarities AND differences) the tissue samples of skin with different shades. The skin samples are very similar, with the differences in coloring mainly made by the dye. However, the pigmented skin samples have these little dark granules of melanin that are highly visible.

2 Skin slide Obtain a microscope and slide of skin (normal skin, not skin cancer). Look at the slide under low power. You will be able to see hair follicles extending out from the skin tissue. Go up to the 10X or 40X to look at the epidermis layer. It is not very thick and stains purple. It will also be flaking off at the top. 1. What type of tissue makes up the epidermis? Epithelial tissue makes up the epidermis, mainly stratified squamous. 2. Look at the dermis layer. Can you find a gland? You may not be able to see any on your slide, but try to find one using the photos in your text as a guide. You may also find blood vessels as well. I did not see any glands. 3. What type of tissue makes up the dermis? Connective tissue makes up the dermis, mainly fibrous connective tissue. Internet search Use the internet to find information about skin cancers. Use reliable medical websites, such as CDC.gov, the Merck manual, the national institute of health (NIH), or the Mayo Clinic. Pick a type of skin cancer and find the following information. Skin Cancer 1. Describe one type of skin cancer (include at least one risk factor, appearance, cells/tissues involved, spread, and test used for diagnosis). Simple squamous carcinoma is a type of skin cancer that affects the uppermost layers of the epidermis, specifically the simple squamous cells. It has multiple appearances, such as red, scaly patches of skin, open sores, and wart-like thickened skin with a central depression. The biggest risk factor is unprotected exposure to the sun, the ultraviolet radiation mutates the skin cells and makes them grow uncontrollably. It spreads slowly across the surface of the skin. It is mainly diagnosed by sight, with additional biopsies performed by histologists and other professionals. 2. Describe an important warning sign(s) for the skin cancer you chose. Atypical spots of skin are the biggest warning signs, typically these spots are firm and scaly compared to the skin around it. Additionally, if there seems to be some sort of depression in the center of it, get it checked out immediately, especially if at home treatments don’t work.

3 Part 2: Introduction to the Skeleton Box of bones Obtain a complete set of bones from the boxes provided. With the help of your lab team/table, lay out the skeleton on the lab bench. Use one of the articulated skeletons in the lab as a guide. You will need to pay attention to the unique structural features of each bone to determine which is the right vs. left, anterior vs. posterior, medial vs. lateral, parts with each of the bones. The boxes of bones may contain limited numbers of the correct number of bones when bones are needed bilaterally, so you may need to work with other groups to complete your skeleton model. Include a picture of your assembled skeleton model in the space below.

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5 Before you pack up the bones, make sure everyone in your group is able to name all of the bones. Skull clavicle Hyoid sternum Scapula ribs Vertebra sacrum Coccyx humerus Ulna radius Carpals metacarpals Phalanges pelvis Femur patella Tibia fibula Tarsals metatarsals phalanges

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