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Integumentary System
Lesson 12
| Question | Answer |
|---|---|
| What is the largest organ of the human body? | the skin |
| The integumentary system is made up of your ______ and ______, ________ __________, ______ _______, and your _______________. | nails, hair, sweat glands, oil glands, skin |
| Skin, nails, and hair grow in a similar pattern. Describe the pattern. | They all grow only at the base. As new cells are formed, older cells are pushed outward. The older cells die off and harden--becoming skin, nails, and hair. |
| What is the outermost layer of your skin called? | epidermis |
| What is the main function of the epidermis? | protection |
| What layer of the skin contains a lot of connective tissue, the muscles that make your hair "stand on end", blood vessels, hair follicles, oil and sweat glands, and sensory nerves? | dermis |
| Where is your skin the thinnest? | on your eyelids |
| Where is your skin the thickest? | on the soles of your feet |
| __________ is a tough protein that is found in the skin, hair, nails, the scales of fish and reptiles, the feathers of birds, and even the horns of rhinos and deer. | keratin |
| This is a pigment in the epidermis that gives the skin a slightly yellow tone. | carotene |
| A lot of this pigment makes the skin brown, olive, or black. | melanin |
| What kinds of foods contain carotene? | squashes, sweet potatoes, and carrots |
| What are melanocytes? | specialized cells that produce melanin deep in the epidermis |
| What are albinos? | people or animals that cannot manufacture melanin |
| The two most common proteins making up the connective tissue in your skin are ______________ and ______________. | collagen and elastin |
| Why do older people get wrinkles? | As the body ages, the skin becomes less elastic, drier, and thinner, which results in wrinkles. |
| These are glands made up of epithelial tissue deep down in the dermis. They are like built-in skin lotion dispensers. | sebaceous glands |
| ________ is an oily substance that coats the skin and hair, keeping them smooth and supple. | Sebum |
| This occurs when someone is exposed to high temperatures for a long time without regularly replacing lost salt and water. | heat exhaustion |
| What are the symptoms of heat exhaustion? | 1. heavy sweating 2. pale skin, 3. muscle cramps 4. tiredness 5. weakness 6. dizziness 7. headache 8. nausea or vomiting 9. fainting |
| At the base of the hair follicle is the ___________, the site of hair growth. | matrix |
| The dead cells make up the __________________of the hair. | shaft |
| Hair has three layers. Name them. | Cuticle, cortex, and the medulla |
| Whether you have straight or curly hair depends on the _________.. | shape of your hair follicles |
| These are the dermal patterns that are like deep, thin canyons that run all over your skin | cleavage lines |
| Another name for hypodermis is ___________________ tissue. | subcutaneous |
| What is the lunula? | the white semicircular part of the nail matrix that you can see |
Created by:
DoulaCindy