The harmful foodstuff eaten is spat out quickly through vomiting and so damages of such foodstuff is minimized. Occurring upon taking of any poisonous food or alcohol, vomiting directly contributes to treatment by ensuring a quick disgorge of the harmful stuff. Variations in amounts of estrogen and progesterone hormones during pregnancy helps in noticing even the least amount of toxins (poisons) found in the blood by way of increasing sensitivity of the chemoreceptor trigger zone within the brain stem. When this zone of the brain takes notice of toxins in the blood, it immediately activates feeling of nausea and vomiting. Margie Profet, a researcher from the University of California at Berkeley was the first person who drew attention to this issue in 1995. She asserted that food craving is a divinely merciful mechanism aiming at protection of the miraculously developing embryo against probable dangers within the human body. She also asserted that food craving protects the embryo from natural toxins in foods. Vomiting may also happen to travellers and sufferers of migraine. Certain psychological factors such as unpleasant smell and excessive fear may result in vomiting as well.

If, however, vomiting recurs and turns out to become a habit, one should be careful, for vomiting causes new problems such as electrolyte losses and dehydration while irritating the alimentary canal, throat, mouth and teeth through which vomited matter passes. In addition to these, regurgitating might be inadvisable and indeed should be avoided in certain cases of poisoning which develop due to ingestion of petroleum products and burning chemicals like hypochlorite and ammonia which are used in house cleaning. The reason for this is because petroleum products may cause pulmonary infection of chemical origin in the lungs and burning chemicals may cause scalds on the tissues they touch during regurgitating.

Just like all the systems that our bodies are equipped with, vomiting also happens in accordance with a plan and program during which a wonderful co-ordination is displayed. The vomiting center in the brain is responsible for such co-ordination.

Rapid increase in salivation and nasal secretion prior to vomiting plays a key role in alleviating damages of the highly acidified vomited matter over the interior surfaces of the mouth and nose. Increased salivation helps with the protection of tooth enamel too. The pushing process of the foods eaten normally occurs from the intestines towards the bowels during the course of digestion. However, it reverses and occurs from the intestines towards the stomach during which the muscles of gastrointestinal tracts relax, open and the contents of the intestines are thus gathered in the stomach. Taking deep breaths prior to vomiting decreases the need for breathing during vomiting and blocking of the air passage by vocal cords’ converging prevents aspiration, that is, the passage of contents of stomach to the lungs. If such mechanisms did not exist, every vomiting attack might have ended catastrophically. Breathing attempts apply negative pressure on the rib cage and convulsion of stomach muscles applies positive pressure within the abdomen in spite of the converging of vocal cords. A pressure decrease is observed in order for contents of the stomach to be regurgitated. Muscles of the gastrointestinal tract tighten while muscles of the gate between alimentary canal and stomach relax just before vomiting. So, regurgitating via alimentary canal occurs without passage of stomach contents to intestines. Upon completion of vomiting, there is the disappearance of abdominal convulsions and the secretion of endorphin in the blood, so a person breathes sigh of relief.

In conclusion, although vomiting is perceived as something which is seemingly unpleasant, it is indeed a fine product of Divine artistry like all other systems and mechanisms of our body. Vomiting, as one of the proofs that God has created nothing useless and unnecessary, is certainly a great blessing bestowed upon us.

References

• “Sickening sounds – research to make your ears cringe.” University of Salford. January 28, 2007.
• Lunsden, K, and Holden WS. 1969. “The act of vomiting in man.” Gut 10: 173-179.
• Margie Profet (1995) Protecting Your Baby-to-Be: Preventing Birth Defects in the First Trimester. Reading, MA: Addison-Wesley. pp. viii, 312.
• Flaxman, S.M. and P.W. Sherman 2000. “Morning sickness: A mechanism for protecting mother and embryo.” Quarterly Review of Biology June 2000. 75:1-36.

The phosphate and nitrogen compounds found in the waste material that are released into the environment go through some biological processes and are transformed into nourishing salts for the phytoplankton. When there is an increase in temperature, these salts may cause some of the phytoplankton to grow and reproduce excessively. The toxic materials released by some, and the use of excessive oxygen, are harmful to other organisms.

Another example of pollution is related with algae. When the number of microbial plants called algae reaches one million per cubic decimeter (1 million/dm3) of water, the consumption of oxygen required in order to mineralize, and break-down the organic materials found in the water increases, and therefore a compound of toxins which pollute the water, such as hydrogen sulfide (H2S), are released. This pollution can cause the death of fish and other organisms which live in the water. As a result of the reduction in water quality, an increase in the type of algae called cyanobacteria occurs and the biotoxins that they produce threatens human health.

More than forty types of algae produce various toxins. Some of these toxins damage the human liver, some attack the nervous system (particularly the brain), some can cause allergic skin reactions, and some can even induce cancer. The release of domestic, industrial, and agricultural waste and the high percentage of nutrients (such as nitrogen and phosphor compounds) into the aquatic ecosystem can cause an excessive increase of algae in the waters. This algal bloom in fresh water is referred to as eutrophication. In oceans, it is referred to as red tide because the water appears to be a reddish color. Both present a significant environmental problem.

In low doses humans are exposed to these toxins by the consumption of drinking water. In Brazil in 1988, almost 2000 people developed gastroenteritis over a forty day period due to the consumption of drinking water contaminated by these toxins, and eighty-eight of them died. In South Australia, as early as 1878, many sheep, horses, dogs and other animals died as a result of drinking water from Lake Alexandrina, which was covered by scum caused by an aglal bloom called Nodularia spumigena.

Mussels, a delicacy eaten and enjoyed by many, accumulate large amounts of toxins because they feed on phytoplankton. One study found that in fresh water mussels (Mytilus galloprovincialis) that fed on cyanobacteria, almost 10.7 g toxins per gram of bodyweight was accumulated. This is also the case in marine mussels. It has been determined that these toxins in gradually increased concentrations are passed onto organisms higher on the food chain by consumption. Accordingly, we should always consider the potential risk factors before consuming shellfish.

Biotoxins are released into the water after being broken down by algae. Thus, when an algal bloom reaches high levels, there is an increase in the density of toxins in the water. As these toxins dissolve in the water, purifying the contaminated water requires not only expensive, but also advanced technology methods. Unfortunately, it is impossible to remove this waste in many of the existing refining plants. The toxin concentration in drinking and utility water should be reduced in regions where drinking water is obtained from lakes by mixing it with uncontaminated water, particularly during the spring when the algal bloom occurs. Thus, reducing the amount of biotoxins in the water to a level that will cause minimal harm to aquatic organisms should help to reduce the risks to humans.

Many types of waste released into the environment cause damage, which adversely affect humans. Polluting the environment may be easy, but purifying the environment of this pollution is a very difficult task. Indeed, humans were not created to act irresponsibly and destroy the universe in which they are mere guests. On the contrary, the human is a delicate guest with sublime duties. Protecting the natural resources provided for our needs and utilizing these resources in the most productive manner, without disturbing the balance of nature, is a duty of every human on earth.

References

• Pouria S. de Andrade A. 1988. “Fatal microcystin intoxication in haemodialysis unit in Caruaru, Brazil.” Lancet 352:21-26.
• Carmichael W.W., Azevedo S.M.F.O. 2001. “Human fatalities from cyanobacteria: Chemical and biological evidence for cyanotoxins.” Environ. Health Perspect 109: 663-668.
• Codd G.A., Bell S.G., Kaya K., Ward C.J., Beattie K.A., Metcalf J.S. 1999. “Cyanobacterial toxins, exposure routes and human health.” Eur. J. Phycol. 34:405-415.