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Authoritative PPT Summary
"Perceptual Information of the Human Body" PPT
Part One: Perception of the External Environment
Types of human body sensations
Vision (eyes obtain the most information from the outside world)
Hearing (the ear ranks second in the amount of information it receives from the outside world)
Touch (skin feels cold, heat, pain, pressure and other stimuli)
Taste (tongue distinguishes sour, sweet, bitter, salty)
Smell (nasal sensitivity to odors)
Sensitively perceive changes in the environment and adjust their own life activities to maintain their own survival.
Perceptual information of the human body PPT, part 2 content: Eyes and vision:
1. Basic structure and function of the eyeball
eyeball
eyeball wall
adventitia
Cornea: allows light to pass through.
Sclera: The internal structure that protects the eyeball.
tunica media
Iris: The central pupil that allows light to pass through.
Choroid
Intima - retina: many photoreceptor cells.
Contents
Lens: refracts light.
Vitreous body
(1) Test your observation skills:
1. Observe the eyes of the group members to find out which two parts of the eye structure are equivalent to the black eyeball and white eyeball that people often say?
2. Have you found the position of the pupil in the eye? Do you know how the pupils change in darkness and light? Why?
(2) A competition of similar things in life: What structures are the lens, pupil, and retina of the eyeball equivalent to in a camera?
Perceptual information of the human body PPT, the third part: Protect your eyes and protect your vision
The light must be sufficient: the light must be sufficient and comfortable. If the light is too weak and the fonts cannot be seen clearly, the picture will get closer and closer.
Don’t read for too long: Whether doing homework or watching TV, don’t read for too long. It’s better to take a break every thirty minutes.
The sitting posture should be correct: do not bend over or hunch over. Getting closer or lying on your stomach while doing homework can easily cause excessive tension in the ciliary muscles, which can lead to myopia.
Do more outdoor sports: often look out into the distance to relax your eye muscles and prevent myopia. Get more exposure to nature, green mountains and green fields, which is beneficial to the health of your eyes.
Nutritional intake should be balanced: no partial eclipse, special attention should be paid to the intake of vitamin B (germ rice, oatmeal yeast).
Don’t sleep too little and have a regular schedule: lack of sleep can easily lead to fatigue and pseudomyopia.
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