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 [...]
In this article we will discuss about the function of stomach. 1. Temporary storage organ: It acts as a temporary storage organ. Because of this, the frequency of eating is reduced. 2. Secretory function (Fig. 5.9): It secretes HCl and pepsin apart from other things including mucus. The G cells of pyloric region secrete gastrin hormone which is one of [...]
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 [...]