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The 3rd and 4th lumbar veins drain into the inferior vena cava. [3]The fate of the two superior lumbar veins is far more variable, and may drain into either the inferior vena cava, ascending lumbar vein, azygos vein, or (on the left side) the left renal vein; the 1st lumbar vein often passes inferiorly to join the 2nd lumbar vein, but may less commonly drain into the ascending lumbar vein, or ...
The deep veins of the lower limb include the common femoral vein, femoral vein, and the deep femoral vein; the popliteal vein, the tibial, and fibular veins. In the common femoral vein one valve is located above the saphenofemoral junction called the suprasaphenic valve. There are sometimes two valves in the same tract.
The three layers of a blood vessel are an inner layer (the tunica intima), a middle layer (the tunica media), and an outer layer (the tunica externa). In dissection , the inner coat (tunica intima) can be separated from the middle (tunica media) by a little maceration, or it may be stripped off in small pieces; but, because of its friability ...
The trunk of the body contains, from superior to inferior, the thoracic region encompassing the chest [1] the mammary region encompassing each breast; the sternal region encompassing the sternum; the abdominal region encompassing the stomach area; the umbilical region is located around the navel; the coxal region encompassing the lateral (side ...
Due to higher radial and circumferential pressures within the vessel wall layers closer to the main lumen of the artery, vasa vasorum externa cannot perfuse these regions of the vessel wall (occlusive pressure). The structure of the vasa vasorum varies with the size, function and location of the vessels. Cells need to be within a few cell ...
The tunica externa (Neo-Latin "outer coat"), also known as the tunica adventitia (Neo-Latin "additional coat"), [1] [2] is the outermost tunica (layer) of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and, in arteries, is supported by external elastic lamina. The collagen serves to anchor the blood vessel to ...
Deep veins of lower limb Femoral vein; Profunda femoris vein; Popliteal vein. Sural veins; Anterior tibial veins; Posterior tibial veins. Fibular veins; Hepatic portal vein. Cystic vein; Para-umbilical veins; Left gastric vein; Right gastric vein; Superior mesenteric vein. Right gastro-omental vein; Ileocolic vein. Appendicular vein; Right ...
Low back pain is the greatest contributor to lost productivity, absenteeism, disability and early retirement worldwide. [26] Difficulty with low back pain most often begins between 20 and 40 years of age. [1] Women and older people have higher estimated rates of lower back pain and also higher disability estimates. [13]