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From the long tube of the gastrointestinal system and the lungs of the respiratory system last week, we move on to that very sensitive system of the body—the skin, and to that miraculous system of the body—the heart and the related circulatory system. You will add words related to the integumentary system and the cardiovascular system to your vocabulary of medical terms.
Start this week by reading the online lectures. Use the textbook to learn medical terms related to these two systems. Read the medical reports carefully to see some of these terms in context. When you think you have understood the report, answer the comprehension questions.When you are ready, take the vocabulary self assessments. Throughout the week post your responses to the discussion questions and reply to the contribution of others. Also, share with other students any mnemonic devices you create.You will end this week by completing the writing assignment and reading it to your facilitator’s voicemail | | |
Integumentary System (1 of 2) |
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An IntroductionThe word integumentary is derived from the Latin word integumentum, which means “to cover.” What covers the body? The skin. The integumentary system consists of the skin, which is the largest organ of the body and covers a surface area of 2 meters. The skin makes up 12–15% of body weight.Of the integumentary system, what you can see are the skin, the hair, and the nails. What you do not see are the hair follicles, the glands, the nerve fibers, the layers of the skin, and the cells in these layers.The outer layer of the skin is the epidermis. This layer has keratinocytes which produce keratin. This is the protein that goes to make nails and hair. The inner layer is the dermis. This layer has sensory receptors that let us feel touch and temperature. In this layer, hemoglobin (red), melanin (brown), and carotene (orange-yellow) make up the color palette that determines the color of the skin.The... [continues]
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