加拿大 科学 十年级 Science Project 壹

Science Project

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壹：Our skin serves many important functions:

Protection

It protects your organs, muscles, and bones from injury. It also protects your body from exposure to germs.

Temperature

It helps keep your body temperature constant, no matter what the temperature is outside.

Sensory Control

It has nerve endings that enable you to feel sensations.

Moisture Control

It keeps your body fluids from evaporating.

贰：Melanin

Melanin also called pigment, melanin is a substance that gives the skin and hair its natural color. It also gives color to the iris of the eye, feathers, and scales. In humans, those with darker skin have higher amounts of melanin. By contrast, those with less pigment have lighter or more fair skin coloring.

叁：Sweat glands in part of our body

Sweat glands are concentrated on the scalp, face, chest, and genitals. 肆：Cuts

When your skin is cut, gently wash the area with warm water and soap. Apply an antibiotic cream or ointment to protect the area from infection and cover it with a sterile bandage. (More serious cuts or injuries should be treated by a doctor immediately.)

伍：Wash face? Hands or towel? Use hands to wash your face.

Apply warm water and a gentle cleanser with your hands, since abrasive washcloths can irritate your skin. Always rinse well and pat your skin dry with a soft towel.

陆：Ways to keep your skin healthy.

Keeping your skin clean is an important part of maintaining your complexion and avoiding skin-related problems. Whether your skin is oily, dry, or balanced, always wash it gently.

Hands and Face

When washing your hands, use warm water and mild soap. (Strong soap can remove oil from your skin, causing dryness.) Keeping your hands clean will reduce the spread of germs to other parts of your body.

Bathing and Showering

Bathe or shower once a day. Twice a day may be necessary for people with very oily skin or physically active lives while people with very dry skin might want to bathe every other day.

Taking long showers or baths with hot water can remove oil from your skin. Be sure to limit your shower or bath to 15 minutes; use warm, soapy water; and rinse yourself well.

Moisturizing

Moisturizers can help your skin stay moist and healthy. They provide a protective seal that helps prevent the evaporation of water through your skin due to exercise or exposure to the elements. Apply a moisturizer after taking a bath or shower or any time your skin feels dry.

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