Biology 8 Lesson 42: Skin hygiene
1. Summary of theory
1.1. Protect the skin
– Dirty skin -> Kill 5% Bacteria -> Skin disease
– Clean the body -> Skin -> Kill 85% of bacteria
– Skin is scratched -> VK invades -> Inflammatory skin disease
=> Pay attention to maintaining body hygiene every day: regularly bathe, change clothes, maintain skin hygiene, avoid injury (scratch, burn, …), do not squeeze acne
1.2. Skin training
– The body is a unified block, so exercising the body is training the organ systems, including the skin.
– Forms of skin training:
- Sunbathing at 8-9 o’clock
- Morning run
- Participate in afternoon sports.
- Moderate manual labor
Skin training principles:
- You have to practice to gradually increase endurance.
- Exercise appropriate to the health status of each person.
- Need to be exposed to the sun regularly in the morning.
1.3. Prevention of skin diseases
To prevent illness:
- Maintain regular body hygiene.
- Avoid skin irritation or burns.
- Sanitation of water sources, residences and public places.
- Timely and proper treatment.
- Take medication as directed by your doctor.
2. Illustrated exercise
Lesson 1: Why is the skin whiter in winter than in summer?
A. Skin pigmentation produces less
B. Skin doesn’t burn from the sun
C. The subcutaneous fat layer thickens
D. Blood vessels constrict
- Choose the answer: A
- Explanation: Skin pigmentation is created to protect the skin from harsh sunlight, when environmental conditions change they will disappear on their own.
Lesson 2: What to do in case of hand burns?
A. Rinse immediately under cool, clean water, apply ointment
B. Put your hand in your ear
C. Wash your hands with cold water that has been stored in the refrigerator
D. Mouth blowing
- Choose the answer: A
- Explanation: First aid for burns needs to quickly cool the injured skin and avoid dehydration (do not use cold water to avoid thermal shock in the skin).
Lesson 3: Why is it easy to get inflammation in places of large wounds?
- On the surface of the skin there are many bacteria, when there is a large lesion, these bacteria have the opportunity to enter the body in large numbers, causing inflammation.
3.1. Essay exercises
Question 1: List measures to maintain skin hygiene and explain the basis of that measure
Verse 2: What to do if the skin is fungal?
Question 3: Why do not take a bath for a long time will feel itchy?
3.2. Multiple choice exercises
Question 1: Why do scars appear on the skin?
B. Animal venom causes
C. Excessive proliferation of skin cells to fill in damaged skin
D. Side effects of metabolic reactions in the body
Verse 2: The receptors located under the skin have the function of sensing stimuli from the environment. This includes touch receptors. Explain why fingertips feel better than elbows?
A. Because the fat layer in the elbow is thicker
B. Since fingertips have more touch receptors
C. Because the elbow does not have a contact sensing function
D. Because the elbow has no contact receptors
Question 3: Why should you not squeeze fish eggs?
A. Caviar also has the function of retaining heat for the skin
B. Caviar is an essential part of maintaining the life of skin cells
C. Creates open wounds in the skin
D. All of the above answers are correct
Verse 4: Why shouldn’t you take a cold shower?
A. Causes pores to close
B. Effects on the internal circulatory system
C. Skin cells are aging quickly
D. Imbalance of heat inside the body
Question 5: Which of the following habits is not good for the skin?
A. Sunbathing at 6-7pm
B. Exercise to sweat actively
C. Sanitize your body every day
D. Drink some water
After completing this lesson, you should know the following requirements:
- Know how to protect your skin and exercise it.
- Presenting some skin diseases, their symptoms and ways to prevent them.