Halitosis or bad breath can be caused by eating

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Halitosis, or bad breath, can be caused by eating certain foods, poor oral hygiene, smoking, bacteria on the tongue, decayed teeth, or gum disease. If halitosis is caused by tooth decay or disease, treatment by a dental professional is needed. an inflammation of the periodontal structures, is caused by bacterial infection. Often called gum disease, periodontal disease begins with the buildup of plaque. The hard, crustlike substance formed when plaque hardens is . Plaque and tartar cause the gums to become irritated and swollen. In this early stage, called gingivitis, the disease is reversible through regular, thorough brushing and flossing. Early detection is important since, left untreated, periodontal disease can destroy the bone and tissue that support the teeth. Malocclusion means “bad bite.” Sources of a malocclusion include extra teeth, crowded teeth, and the misalignment of the upper and lower jaws. Malocclusion can lead to decay and disease, and it can affect a person’s speech and ability to chew. Some malocclusions can be corrected by wearing braces, which reposition teeth by exerting pressure on them. tartar Periodontal disease health.glencoe.com
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VOCABULARY lacrimal gland sclera cornea choroid retina Eye Care YOU’LL LEARN TO Identify the parts of the eye. Understand how the eye forms visual images. Examine the effects of health behaviors on the eye. Describe different types of eye problems. ore than 70 percent of the sensory informa- M tion your brain receives comes to it by way of your eyes. The function of the eye is to gather light. The images formed in the eye are sent to the brain, which interprets those images. The amount of light that enters the eye is controlled by the size of the pupil. When light hits the retina, light-sensitive cells are stimulated and an image is formed. Your Eyes our eyes sit in bony sockets, called orbits, in the front of your Y skull. A layer of fat surrounds each eyeball and cushions it inside its socket. The eyebrows, eyelashes, and eyelids protect the eyes from foreign particles and bright light. Each eye has a group of structures that make and allow drainage of tears. One of these structures is the the gland that secretes tears into ducts that empty into the eye. As you blink, tears are moved across the surface of the eye. On average, most humans blink about 6,205,000 times a year! Tears keep the surface of the eyeball moist and clear of foreign particles. Tears consist of water, salts, and mucus that protect the eye against infection. lacrimal gland Make a list of activities during which some type of eye protection should be worn. Consider both recreational and sport activities, such as playing hockey, and tasks such as mowing the lawn. 371 Lesson 3 Eye Care Like the click of a camera lens, in the blink of an eye images are formed in the process of vision.
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