Histological characteristics of the different vascular systems are described below: 1. Arteries 2. Arterioles 3. Capillaries 4. Veins 5. Blood Vessels of Blood Vessels. 1. Arteries: In the arteries, all the layers (Fig. 7.14) are present. The two outer layers are very thick, because it has to withstand considerable blood pressure. The tunica media consists chiefly of circularly arranged smooth [...]
In this article we will discuss about:- 1. Normal Values of Hepatic Circulation 2. Factors Modifying Hepatic Circulation 3. Peculiarities. The hepatic artery is not an end artery and has got anastomotic channels with the portal vein at several levels of the interlobular regions (Fig. 7.107). The hepatic artery transfuses the portal vein as well as the sinusoid at a [...]
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 [...]