why do we cry when we cut up onions

why do we cry when we cut up onions

Mark Anthony in Shakespeare's may have referred to "the tears that live in the onion". But why do onions actually make us cry? And why do only some onions make us blub in this way when others, including related 'allium' plants such as garlic, barely ever draw a tear when chopped? When any vegetable is damaged, its cells are ripped open. The plant often then tries to defend itself by releasing bitter-tasting chemicals called that can be off-putting to hungry animals trying to eat it. But an onion's defence mechanism goes further, producing an even more irritating chemical, propanthial s-oxide, meant to stop the plant being consumed by pests. This volatile chemical is what's known as a lachrymatory factor. Its volatility means that, once it's released, it quickly evaporates and finds its

 why do schools require inoculations for childhood diseases

why do schools require inoculations for childhood diseases

Students and child care workers are to be vaccinated against certain diseases in Rhode Island. These requirements are based on recommendations from the, the, and healthcare providers in Rhode Island. More information about these diseases is available. Requirements for students entering pre-kindergarten, child care, or day care centers 4 doses of DTaP (diphtheria, tetanus, pertussis) vaccine 1 dose of MMR (measles, mumps, rubella) vaccine A student entering kindergarten must have met the pre-kindergarten immunization requirements, plus: 1 dose of DTaP (diphtheria, tetanus, pertussis) vaccine 1 dose of MMR (measles, mumps, rubella) vaccine A student entering 7th grade must have met the pre-kindergarten and kindergarten immunization requirements, plus: 1 dose of Tdap (tetanus, diphtheria,

 why do we have to write essays

why do we have to write essays

Why write essays? Essay writing has important skills development and educational functions. It allows you to practise and develop transferable skills that are valuable to you not only while you re a student but also when you graduate and have to write in a professional role. reading and note-making, critical thinking and analysis, organising ideas, arguing a case, and communicating effectively with a reader. ...

 why do tonsils have to be removed

why do tonsils have to be removed

What Is a Tonsillectomy? Have you ever had? That's when your tonsils, in the back of your throat, get sore and infected. If tonsillitis happens to you a lot, the doctor may suggest you have an operation to remove your tonsils. Or maybe you have really large tonsils that make it hard for you to breathe at night. That's another reason the doctor may say they should come out. Your tonsils are two lumps of tissue that work as germ fighters for your body. The trouble is that sometimes germs like to hang out there, where they cause infections. In other words, instead of fighting infections, the tonsils become infected. The surgery to remove tonsils is called a (say: tahn-suh-LEK-tuh-mee). After this operation, kids usually don't have as many sore throats. And, if they were having trouble

 why do we need cash flow statement

why do we need cash flow statement

The three standard statements of most financial packages include the, the, and the Cash Flow Statement. The P L is often considered the most important and relevant statement by most owners, managers, and analysts, however, the astute accountant can make a strong argument about why the Balance Sheet is really the most important statement of the three. And then there is the Cash Flow Statement, often overlooked, usually misunderstood and skimmed over with a fleeting glance, but a very critical and integral part of the financial statements. The Cash Flow Statement is the Бnew kid on the blockБ that was first required on the financial statements of public companies in 1988, but is an integral part of financial reporting that ties the other reports together for a complete picture of a

 why should baby sleep in parents room

why should baby sleep in parents room

A new study suggests infants may sleep longer when they are sleeping alone. According to aВ Pediatrics, babies who slept alone at four months were sleeping one hour and 40 minutes longer at nine months of age, compared to babies who still shared a room with their parents. This research actually contradicts recommendations by the American Academy of Paediatrics (AAP) and The Canadian Paediatric Society (CPS). The AAP recommends to prevent sudden infant death syndrome (SIDS);ВCPS alsoВrecommends that infants sleep in a for the first year. And while 90 per cent of SIDS cases happen in the first six months, study author Dr. Ian Paul says more research needs to be done in the six- to 12-month period. READ MORE: Many paediatricians and sleep experts question the room-sharing recommendation

 why do we need the stock market

why do we need the stock market

by Stock Market is the one of the most lucrative industries which provides freedom to work from any location as well as at any time. i. e. , one may sit anywhere they want to and be able to trade in stock market anytime one may prefer. Also, there is no minimum educational qualification required and no age limit to start. Also, everyone irrespective of their background gets an equal opportunity of making money from money. There is no other industry or employment where such freedom and opportunities are given. Other than that the capital requirements for holding a position in share market are not that substantial that one may need and the ability to leverage one's position adds to the opportunity to scale up profits quickly. ...

 why do we need god in our life

why do we need god in our life

Some feel that they have no need for God because they find many puzzling issues in life incompatible with belief in a loving God. For example, they may ask: БWhy do good people have to suffer? Б БWhy are some innocent babies born deformed? Б БWhy is life so unjust? Б Those are serious questions indeed, and finding satisfying answers to them can have a deep impact on our life. But instead of quickly blaming God for such problems, let us see how GodБs Word, the Bible, can shed light on this subject. In, we find the account of Satan, who, under the guise of a serpent, attempted to get the first human couple to go against Jehovah GodБs command not to eat from the tree of the knowledge of good and bad. БYou positively will not die,Б Satan told Eve. БFor God knows that in the very day of your

 why do you let me stay here

why do you let me stay here

Почему ты позволяешь мне остаться здесь? Почему ты позволяешь мне остаться здесь? Почему ты не приезжаешь и не играешь здесь? Почему ты не усаживаешься напротив и не сидишь так некоторое время? Нам нравятся те же самые вещи, и мне нравится твой стиль Это не секрет; почему ты держите это? ...

 why do scientists use the same system of measurement

why do scientists use the same system of measurement

The metric system is the most widely used system around the world for measuring weight, distance and volume. Having a common system across all countries allows scientists to accurately compare their findings. The metric system uses three basic units from which all others are calculated: grams for weight, meters for length and seconds for time. This gives all scientists the same standards of measurement when they conduct experiments. To represent large amounts of a fundamental unit, prefixes are used to denote factors of 10. For example, a decameter is 10 meters, a hectameter is 100 meters and a kilometer is 1,000 meters. ...

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