The Integumentary System 4. Compare the functions of the stratum corneum of a hu

Question

The Integumentary System 4. Compare the functions of the stratum corneum of a human and the bark of a tree. 5. Compare and contrast the features of the stratum corneum in the thin skin and thick skin. 6. You fall off your skateboard and scrape your knee. After checking your injury, you note that you are not bleeding. What layers of the integument are the most damaged? Which layers are not? 7. Speculate on the reasons for differences in skin texture and hair between men and women. 8. Speculate on the reasons for the absence of hair on the ventral surface of the hand (palm). 9. Think about all the times you have put on gloves, a hat, a scarf, or sat down on a chair. How long does it take for you to stop noticing that those items are in contact with your skin? Describe the principle that is in operation when you no longer sense that contact 10. Again, consider all the times you have put on gloves, a hat, a scarf, or sat down on a chair. Does the sensation and your awareness of contact persist longer if the chair or clothing is hard, rough, or otherwise uncomfortable? Propose a reason for this. (Hint: Are all sensations equal with regard to receptor adaptation?) 11. Hair, nails, and the epidermis of the skin are all mostly made of keratin, but are different with regard to durability. What does this suggest about the nature of the keratin produced in different areas of the body?

Explanation / Answer

Ans:

4. This complex surrounds cells in the stratum corneum and contributes to the skin's barrier function. Its modified desmosomes facilitate cellular adhesion by linking adjacent cells within this epidermal layer. This layer is responsible for the "spring back" or stretchy properties of skin.

Bark is the outermost layers of stems and roots of woody plants. Plants with bark include trees, woody vines, and shrubs. Bark refers to all the tissues outside the vascular cambium and is a nontechnical term. It overlays the wood and consists of the inner bark and the outer bark.

5. Tough skin is just found in two essential areas— the palms of the hands and the bottoms of the feet, ranges of the body that are routinely subjected to broad scraped area. Tough skin has an essentially thicker epidermis than thin skin, it contains sweat organs, however needs hair follicles and sebaceous organs.

Thick skin is only found in areas where there is a lot of abrasion - fingertips, palms and the soles of the feet. An H&E stained section of the epidermis of thin skin. There are only four layers in the epidermis of thin skin. The stratum lucidum layer is absent.

7. Besides having facial hair, there are structural differences between men's skin and women's skin. Androgen (testosterone) stimulation causes an increase in skin thickness, which accounts for why a man's skin is about 25% thicker than a woman's. In addition to being thicker, a man's skin texture is tougher than women. Even, the hormone testosterone determines the masculine characteristics of male skin and gives it a different structure to female skin. While every man’s skin is unique, in general, male skin on both the face and the body is thicker, oilier and ages differently.

8. Because, the epidermis in these parts of the body is very thick and highly keratinized, and when combined with the thick underlaying layer of dermis, this results in skin that does not support the growth and maturation of hair follicles.

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