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THYROID GLAND

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THYROID GLAND

It is the largest endocrine gland and is highly vascular. It lies on the ventral and lateral sides of the upper part of the trachea and neck.

Structure and Function

It is brownish red, shield shaped, bilobed gland. The two lobes are connected by a bridge of tissues calle isthmus. The lobes of the gland are made up of follicles or acini. They secrete a hormone called thyroxine derived from tyrosine, an iodinated amino acid.

Functions of Thyroxine

  • They control the rate of oxidation and production of energy by maintaining the Basal Metabolic Rate (BMR) of the body.
  • They control growth of physical, mental and sexual growth of the body. Growth of central nervous system and bones is regulated by thyroxine.
  • Regulates Iodine and sugar level in blood.
  • Control the working of kidneys and urine output.
  • Regulates carbohydrate and fat metabolism.

Improper secretion of the thyroxine hormones results in the following diseases. Increased secretion results in Hyperthyroidism and less secretion in Hypothyroidism.

Source Link:http://tnpsc.wordpress.com/2014/03/12/thyroid-gland/

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Last Updated on Tuesday, 01 April 2014 13:43

Life expectancy in India goes up by 5 years in a decade

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Statistics released by the Union ministry of health and family welfare show that life expectancy in India has gone up by five years, from 62.3 years for males and 63.9 years for females in 2001-2005 to 67.3 years and 69.6 years respectively in 2011-2015. Experts attribute this jump – higher than that in the previous decade – to better immunization and nutrition, coupled with prevention and treatment of infectious diseases.

Life Expectancy

The World Health Organization (WHO) defines life expectancy as “the average number of years a person is expected to live on the basis of the current mortality rates and prevalence distribution of health states in a population”. In India, average life expectancy which used to be around 42 in1960, steadily climbed to around 48 in 1980, 58.5 in 1990 and around 1962′s in 2000.

Source Link:http://tnpsc.wordpress.com/2014/01/29/life-expectancy-in-india-goes-up-by-5-years-in-a-decade/

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Last Updated on Friday, 07 February 2014 01:48

Human Body – Some Interesting Facts!

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  • Enamel is hardest substance in the human body.
  • One brain cell may be connected to as many as 25,000 other brain cells.
  • Through blinking we spend about half an hour of our waking day with our eyes closed.
  • The thigh bone, called femur is the longest and the largest bone in our body.
  • The smallest bone is the stirrup bone in the middle ear.
  • The coronary heart disease is the most common cause of sudden death.
  • The size and shape of a person’s nose can affect his or her voice.

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  • It takes about 17 muscles to smile, but about 43 to frown.
  • Liver is the largest organ in our body, weighing about 1.6 kg.
  • Each day our heart beats normally over 1, 00,000 times.
  • Most people have 12 pair of ribs. But one out of every 20 people has at least one extra pair.
  • The hair on our head usually lives for 2-6 years before dropping out.
  • Our eyelids have the thinnest skin on our body (1 mm thick) while our soles have the thickest skin (about 3 mm thick).
  • Each side of the brain controls opposite side of the body.
  • An average man has about 5.5 liters of blood.
  • The fastest muscles on our body are those that blink the eyelids.
  • We can blink as fast as 200 times per minute.
  • There are 206 bones in our skeleton. A new-born baby has 300 bones, out of which 94 bones join together as he or she grows.
  • Blinking helps to wash tears over our eyeballs. That keeps them clean and moist.
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Last Updated on Wednesday, 09 October 2013 19:20

Dental Caries

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  • Dental caries or tooth decay causes gradual softening of enamel and dentine.
  • It begins when bacteria acting on sugars produce acids that softens or demineralises the enamel.
  • Masses of bacterial cells together with food particles stick to the teeth to form dental plaque.
  • Saliva cannot reach the tooth surface to neutralise the acid as plaque covers the teeth.
  • Brushing the teeth after eating removes the plaque before the bacteria produce acids.
  • If untreated, microorganisms may invade the pulp, causing inflammation and infection.
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Last Updated on Wednesday, 09 October 2013 19:22

Food is the Source of Energy

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Food is the main source of energy for any living organisms on this planet. It is the "petrol" that helps the human beings complex mechanism to perform their functions. However, not every food nourishes us - in every sense of the word as it implies. First of all, it all depends on your habits, namely, the value of portions of any food eaten at a time. After all, we are organized differently than cars and scooters, and with a full tank - not the pass.  

The ancient Sufis knew that the less you eat, the more energetic you feel. If we are to fill out the stomach, the large amount of blood rushes to our digestive tract, making us lethargic and drowsy in the process.
And secondly, it all depends on your culinary preferences. Scientists were not too lazy, and decided to conduct large-scale studies of a number of products purchased in supermarkets. In fact, it has been checked how certain foods affect our state of energy.


The following is the list of carotid products or ’Sleepy Food':


· Turkey meat: The composition of turkey meat has certain specific proteins that have a relaxing effect on the human body. Of course, the portion of the meal of turkey will not induce a sleep for you, but 
remember that the abuse of turkey significantly reduces your performance.

· Sugar and all sweet is not good. Racing glucose in the blood, as a rule, quickly tire the body. That is why the sweet tooth often complain of a lack of strength. Perhaps it is worth to give up your favorite candy and soda? Will you?


· Drinking alcohol inhibits the activity of the nervous system. After alcohol the body becomes sluggish, and seems about to fall asleep soon. Typically, such "alcoholic" is anything but a dream complete, because during sleep the body cannot rest and did not accumulate enough energy for the day to come.
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Last Updated on Monday, 12 August 2013 02:35
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