The normal rate or respiration in an adult is 14 to 18 per minute with a tidal volume of about 500 ml. The rate and depth of respiration (pulmonary ventilation per minute) is adjusted according to requirement of the body. For instance during muscular exercise metabolic activities are increased and the demand for oxygen by the working muscles is increased. [...]
In this article we will discuss about the contents of oxygen in blood of human beings. The O2 content of the arterial and venous blood and relevant data are given in the following table: It will be seen that about 98% of oxygen is present in the blood in chemical combination with haemoglobin and only 0.3 ml in arterial blood [...]
In this article we will discuss about the cheyne-stroke breathing in human beings and along with its mechanism. Cheyne-Stokes Breathing: In which the period of apnoea is followed by a phase of gradually rising ventilation followed by gradual fall and the cycle is repeated, each phase lasting about 30 seconds. Cheyne-Stokes breathing- sometimes occurs in normal children or adults during [...]