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 [...]
Two separate processes are involved in vocalisation: 1. Phonation 2. Atriculation. Process # 1. Phonation: The whole process is dominated and co-ordinated by speech centre in the cerebral cortex, damage to which will lead to permanent aphasia. Phonation is due to vibration of vocal cords which are folds stretched along the lateral wall of the larynx between thyroid and arytenoid [...]