Week 2 Atlas Application Integumentary System

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ECPI University, North Charleston *

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111L

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Mechanical Engineering

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Feb 20, 2024

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docx

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3

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Date: 02/02/2024 Integumentary System Lab Last updated: 6/15/2023 Activity 1: Skin Overview Part 1: Skin Overview Open Visible Body Suite. Search for and select the Animation "Function of the Skin. " Watch the animation and answer the following questions. 1. List the functions of the integumentary system. The skin, nails, and hair of the integumentary system provide a barrier between the environment and tissues and organs within the body. The skin is the largest organ in the body and it absorbs nutrients, regulates internal body temperature, and eliminates waste. 2. Homeostasis is the process by which a healthy internal bodily state is maintained through physiological regulation. In 1–2 sentences, explain how the skin is involved in homeostasis. The skin is involved in homeostasis when sweat glands reduce body temperature by releasing sweat. 3. All skin tissue is composed of three main layers. Name the three layers of skin from superficial to deep. Epidermis, dermis, hypodermis Part 2: Touch Open the Integumentary System View "Touch Receptors. " Explore the touch receptors found in the dermis and epidermis. Select the structures to learn their names and functions. 1. Using the information learned in this activity, match the following terms to their respective function:
_ c ___ Tactile (Merkel) epithelial cells __ b __ Tactile (Meissner’s) corpuscles __ a __ Free nerve endings __ d __ Lamellar (Pacinian) corpuscles a. Detect pain, temperature, itch, and tickle b. Transmit signals related to touch and vibration c. Transmit signals related to touch d. Detect light touch, pressure, and vibration Part 3: Melanin and Melanocytes Open the Integumentary System View "Skin (Dark Pigmentation). " Explore melanocytes by reading their definition to learn how melanin and melanocytes are related. 1. In 1– 2 sentences, describe the role of melanocytes. Melanocytes produce melanin- the pigment that protects skin from UV damage and determines skin color. 2. In 1–2 sentences, compare the melanocytes of individuals with darker skin to the melanocytes of individuals with lighter skin. Individuals with darker skin have more melanocytes compared to individuals with lighter skin who typically have less melanocytes.
Activity 2: Hair Overview Part 1: Hair Overview Open the Integumentary System View "Hair Follicle (Curly Hair) " and select any part of the hair follicle. Click the drop down arrow next to the structure name and you should now see the structure "Hair. " Click on "Hair " and read the structure definition. 1. List the functions of hair. Hair insulates the scalp, protects the eyes and ears from foreign particles, and helps sense light touch. 2. Remember that homeostasis is the process by which a healthy internal bodily state is maintained through physiological regulation. In 1–2 sentences, explain how hair is involved in homeostasis. Hair is involved in homeostasis because hair is important in   preventing heat loss from the head and protecting its skin from UV radiation . Part 2: Curly Hair vs Straight Hair Open the Integumentary System View "Hair Follicle (Curly Hair). " Explore the structures to learn their names and functions. Open the Integumentary System View "Hair Follicle (Straight Hair). " Explore the structures to learn their names and functions. Use what you have learned in those two models to answer the following question. 1. In 2–3 sentences, describe some of the factors that influence the appearance of hair in straight hair vs. curly hair. If the follicle bulb is round, hair tends to grow out straight. If it is oval, it will be curly. The more oval the bulb, the more of a kink you will get in your hair strands. Another key factor in determining curl is   the angle that the follicle sits in the dermis - the below-surface skin .
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