help on these questions skin layers, accessory structures, and tissue types in t

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help on these questions

skin layers, accessory structures, and tissue types in the longitudinal section through skin below c. d. e. (specific layer) (specific tissue type) (specific layer) (specific tissue type LM (200x) Activity 3: Determining Sweat Gland Distribution Why did the presence of an eccrine sweat gland result in a blue-black dot on the paper when you performed this activity? 1. 2. Eccrine sweat glands are located in the skin of the palm and forehead, but not in the forearm. a. true b. false

Explanation / Answer

ans a) Epidermis layer-Outer portion of the layer consist of 4 types of layer. Basal layer folded to form dermal papillae. b) Dermis- Inner portion, contains nerves, blood supply and fibroblasts etc. c) Squamous epithelium tissue- It does not have its blood supply depends on the blood supply from dermis. d) Sebaceous gland- Oil secreating gland. e) Connective tissue-Forms dermis layer. f) Hair follicles- Attached to sebaceous glands and regulates hair growth. Activity 3) ans1) This activity requires iodine. In this activity we apply iodine on the skin . Once the iodine is dry , tape the paper on skin and leave it for 20 min. Blue black dots shows positive for sweating while white paper portion shows negative for sweating. As we sweat , iodine moves from skin to paper and convert starch in the paper blue black . This activity shows the distribution of ecrine glands. Ans2) False . Ecrine glands are major sweat glands present virtually in all skin types but higher density in palm, sole and forehead. Ecrine glands are tubular structure that open directly at the top of the skin , between the hair follicles.

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