In this article we will discuss about the regulation of respiration in humans. Oxygen requirement by the body differs depending on the activity. It is lowest at rest and increases during routine activity and further increases in muscular exercise. Similarly production of carbon dioxide also is dependent on the rate of metabolic activity in the body. Respiratory system has the [...]
In this article we will discuss about the functions of respiratory system of humans and its mechanisms. Functions of respiratory system can be broadly classified into: a. Respiratory b. Non-respiratory. a. Respiratory Function: It is to provide adequate volume of oxygen to the tissues. Normal person at rest needs about 250 ml of oxygen per minute. Atmospheric air enters the [...]
The functions of saliva are: 1. Lubrication of food: Assisted by chewing, saliva gets mixed with food in the mouth; the mucin which is a sticky substance helps to form bolus. Saliva prepares the food for swallowing forming a slippery coat over the bolus. 2. Solvent action: Taste is a chemical sense. Any substance, the taste of which has to [...]