Body mass index is an approximate index that tells if a person is at a healthy body weight. So what is BMI calculator? A BMI calculator combines the height and body weight to give a number. This number is the body mass index. There are BMI calculators that can be used online as well.

The exact cause of one of the most common respiratory disorders, asthma, is not known. In most cases, it appears that a family history of allergies and environmental factors play an important role. The immediate cause of asthma is the inflammation of the walls of the bronchi which allows air to the alveoli part of the lungs.

Asthma is one of the respiratory disorders of the lungs and has a periodic aggravation. Very quick acting medicines are needed to control these episodes and provide relief to the patient. These are called rescue medication. This group contains quick, short acting bronchodilators called short-term beta agonists. Another group of medicines used for asthma treatments give relief within minutes.

Emphysema is an oppressive respiratory disorder which results from the disintegration of the alveoli, i.e., the tissues where the interchange of gas with blood takes place. Destruction in any large scale will reduce the gas transfer area and the process of gas transfer itself, leading to oxygen starvation or hypoxia.

Emphysema is caused by continuous exposure of the bronchioles to irritants such as cigarette smoke, passive smoke, industrial solvent fumes etc. This makes the muscles of the bronchioles contract. Chronic exposure to irritants make these muscles contract permanently. Then, the mucus membrane lining the bronchioles start secreting mucus in order to wash away particulate irritants.

Fitness is an ever evolving industry where trends tend to change rapidly. In the recent years, we witnessed the emergence of several trends that took fitness freaks around the world by a storm. However, only few of them were good enough to survive and be relevant to fitness enthusiasts presently and in the coming future.

It is important to take optimum care of your teeth, for which you must visit your dentist regularly to get the right treatment. You will come across a wide range of services that are provided by a specialist in the related field. Sometimes a person can face bad oral health, which includes bad breath along with gum diseases.

Genital or oral herpes can be distressing, especially if you suffer from frequent outbreaks. While it may me difficult to kill the herpes virus, the disease can be managed by understanding its nature and causes. Herpes is caused by two kinds of herpes simplex virus; the HSV-1 that usually causes cold sores and facial sores, and HSV-2 that causes sores on the buttocks, genitals or rectum.