Anatomy of Circulation: Blood enters lungs through two sources; pulmonary artery and bronchial arteries. The cross-sectional area of the pulmonary artery is same as that of the aorta, but it is more elastic and distensible. Through the pulmonary artery venous blood of the right ventricle goes to the lungs for oxygenation. It also carries nutrition to the pulmonary tissues. Bronchial [...]
These changes are described below under the following headings: 1. Changes in Respiration: i. Pulmonary Ventilation: Pulmonary ventilation in moderate exercise is always linear with the amount of O2 absorbed. It has been observed that a linear relationship between the work load and the pulmonary ventilation is maintained until the work load is so increased that the steady state is [...]
In this article we will discuss about the anatomy of cutaneous circulation in humans with the help of suitable diagram. Vascular architecture of the skin has the general pattern of the capillary circulation. For the most part, papillae contain capillary blood vessels and nerve endings. The arteries that supply the skin, originate from richly anastomosing irregular plexus (first plexus) of [...]