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What are two examples of resident bacteria?

Staphylococcus epidermidis helps protect the body from other forms of staphylococcus bacteria. Lactobacillus helps with the digestion and absorption of foods. Resident bacteria are bacteria species that live on the human body. These microbes cause no harm and can even help protect the body from disease. Resident bacteria can be found in the skin, the digestive tract, the upper respiratory system, the mucous membranes and the urogenital system.

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What household items are made from rocks?

Rocks consist of minerals, and they can be hard or soft. Coal, limestone and granite are examples of hard rocks, while clay and sand are examples of soft rocks. A special sand that contains pure quartz grains, limestone and other chemicals makes up glassware.\nRocks are essential components of various kitchen utensils and cutlery, and their mineral contents are also part of some foods and beverages. Special clays, known as china clay or ball clay, are used to create crockery. These clays form when the mineral in granite disintegrates. People mold the clays into different shapes and heat them i..

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What is the chemical name for Fe2O3?

Iron (III) oxide is commonly used to produce iron. It's also used in calamine lotion in the medicine industry, and jewelers also use it for polishing jewelry. The compound also previously played a role in magnetic storage media, although newer technologies have replaced this use. Iron (III) oxide has a density of 5.242 grams per cubic centimeter, and it is not soluble in water.

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Where do filtration and reabsorption occur in the kidneys?

The kidneys are responsible for filtering wastes out of the blood and maintaining normal fluid and electrolyte balances. Each kidney has approximately one million filtering units called nephrons, which filter harmful wastes out of the blood. In people with kidney disease, the kidneys do not filter the blood as well as they should. As a result, minerals and waste products build up in the bloodstream, causing fatigue, nausea and other symptoms.

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What is the difference between a tropical wet and dry climate?

Because a long portion of the year lacks any rainfall, there are very few trees in the savanna. Most of the vegetation consists of scrubby plants, grasses and forbs. Large ungulates and the predators that hunt them are among the most important animals in savanna habitats. Such habitats are found throughout portions of sub-Saharan Africa, South Asia and portions of South America.\nPlaces that experience tropical wet climates receive enough rainfall to sustain a population of trees. The combination of abundant rainfall and warm temperatures throughout the year produce rainforests that have incre..

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What makes the strongest glue for plastic work so well?

Non-reactive glues, also known as solvent cements, are designed to turn two pieces of plastic at a joint into a single piece of material. The solvent can be applied to one or both of the plastic surfaces. The solvent softens and melts the plastic where applied. Pressure added to the two plastic pieces helps to create a joint that consists of both melted surfaces mixed together.\nReactive glues are created by mixing a catalyst and a base resin to create the adhesive. This mix is then applied to the joint where it hardens, holding the two plastic pieces together. The joint is typically strong an..

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What are the benefits of good bacteria?

Good bacteria, or probiotics, may help with conditions such as irritable bowel syndrome, digestive tract infections and some cases of diarrhea. If the presence of good bacteria decreases due to taking antibiotics, yeast can build up and lead to conditions such as urinary tract infections and digestive illnesses.\nAlthough there are over 400 types of good bacteria in the digestive tract, taking antibiotics over a prolonged period can kill them and lead to an imbalance in the digestive tract. Certain probiotics, such as lactobacillus acidophilus, which is found in some yogurts, can replenish the..

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What are some facts about light energy?

Electromagnetic energy, also called electromagnetic radiation, is the flow of photons through space. Photons are the quanta of light, which means they are the smallest possible unit of light. Photons always move at the speed of light, which is approximately 186,000 miles per second. Electromagnetic radiation moves in a wave pattern and exists in a spectrum of different types of energy that correspond to different wavelengths. One of the wavelengths is called visible light because it consists of all the colors visible to humans. The other wavelengths of electromagnetic energy correspond to othe..

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How many centiliters are in a liter?

The prefix “centi-” is used frequently in the metric system of measurements, or the International System of Units. It allows scientists to quickly convert from one metric unit to another. For example, to convert from centiliters to liters, one can simply divide the value in centiliters by 100, or they can multiply the value by 10^-2. Understanding the common prefixes in scientific notation and the metric system allows scientists to understand commonly used measurements.

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What drains the aqueous humor from the eye?

The majority of the aqueous humor in the eye flows out of the trabecular meshwork; this process is called the conventional outflow method, according to the International Glaucoma Association. A smaller amount of aqueous humor leaves the eye through the ciliary body; this process is called the uveo-scleral or non-conventional outflow pathway.\nThe BrightFocus Foundation elaborates by saying that the aqueous humor, the fluid produced in the eye, allows vision to remain normal when it is flowing freely. However, when the aqueous humor is blocked, this can produce interocular pressure that, over t..

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