In this article we will discuss about:- 1. Characteristics of Pulmonary Circulation 2. Pressures in the Pulmonary System 3. Factors 4. Measurement. Characteristics of Pulmonary Circulation: 1. The entire pulmonary vascular system is a distensible low pressure system. 2. Reservoir: Because of their distensibility, the pulmonary veins act as an important blood reservoir. The volume of blood at any one [...]
In this article we will discuss about the changes that take place in the fetal circulation of blood at birth: 1. Primary Changes in Pulmonary and Systemic Vascular Resistance 2. Closure of the Foramen Ovale 3. Closure of the Ductus Arteriosus 4. Closure of the Ductus Venosus. 1. Primary Changes in Pulmonary and Systemic Vascular Resistance: First, loss of the [...]
In this article we will discuss about:- 1. General Features of Cerebral Circulation 2. Regulation of Cerebral Blood Flow 3. Measurement. General Features of Cerebral Circulation: 1. Adult brain weighs 1400 gm (2% of body weight), 60% is composed of white matter, 40% is composed of grey matter. 2. Cerebral blood flow is 750 ml/min or 50-60 ml/ min/100 gm. [...]