Vessel(s) [Vas(-A), Pna, Bna, Jna] In Anatomy

Greetings, dear reader! Today we would like to talk about the vessels in our anatomy.

Vessels are tubular formations through which blood or lymph flows, and they play an important role in the functioning of our body. Vessels can be of different diameters and shapes, but they all perform the same function - they provide blood and lymph circulation. Vascular networks permeate the entire body and distribute blood and lymph to all organs and tissues.

Among the vessels are: * Arteries - branches of arteries - these are the largest vessels that carry arterial blood from the heart to the organs. Arteries have a thick wall covered with endothelium and are filled with an elastic mass - the pulse. The walls of the arteries are separated from the surrounding environment by the subendothelial layer and adventitia. Bundles of loose fibrous connective tissue (transverse and longitudinal) are located between the inner membrane and the subendothelium. In the wall of the abdominal aorta there is also intermuscular tissue with bundles of striated muscles oriented along the axis of the vessel. At the anterior end, this muscle bundle forms a powerful external-internal neurovascular bundle, consisting of the superior mesenteric artery, inferior mesenteric vein and superior mesenteric plexus. It should also be noted that medium-sized arteries are often intraorganic - most of the branches to the internal organs (primarily to the skeletal muscles) pass through them. Venous outflow from internal organs is mainly carried out through arterial branches anastomosing with intraorgan arteries. This distribution path ensures their blood supply, eliminates volumetric deformation due to compression and minimizes the likelihood