Thoracic duct The thoracic duct is the chief collecting trunk of the lymphatic system. It drains lymph from all parts of the body except the right forelimb, right side of head neck and thorax. It extends from about the level of the first lumbar vertebra forwards a little beyond the thoracic inlet. Its beginning is […]
The lymphatic system is a network of tissues and organs that help rid the body of toxins, waste and other unwanted materials. The primary function of the lymphatic system is to transport lymph This system consists of the lymph vessels and lymph glands connected with the venous part of the blood vascular system, containing the lymph. The lymph is a
Mammary veins deserve special notice for Venous drainage of Udder. They form a venous circle at the base of the udder, which is drained chiefly by two pairs of vein. The external pudic vein in the cow is of large size and forms one of the mammary vein. The other veins of the mammary gland
Portal Vein is a large venous trunk draining the blood from the stomach and intestine and contains the digested nutrients, which are absorbed from the small intestine and destined to reach the liver. It is formed by the union of two trunks, gastric and mesenteric. The gastric trunk is formed by the union of the
Saphenous vein Saphenous vein is a subcutaneous vein on the medial surface of the thigh and leg. It is the upward continuation of the medial metatarsal vein arising from the deep plantar arch. It runs upwards in the distal part of the leg just anterior to tendo-achilles and is accompanied by the saphenous artery and tibial nerve.
Posterior vena cava is the largest venous trunk in the body. It is formed under the body of the fifth lumbar vertebra by the union of the two common iliac veins (each common iliac vein is formed by the union of the external and internal iliac veins). It receives the middle sacral vein passes forwards
Subcutaneous thoracic vein (External thoracic vein) This vein is inconstant. It arises from the region of the flank and the abdominal wall and passes forwards under the cutaneous muscle in company with the nerve of the same and joins the deep brachial vein in the axilla. It may join the brachial or subscapular veins. It is
The cephalic vein is formed by the upward continuation of the medial metacarpal vein. It passes subcutaneously upward and forwards in an oblique manner on the medial face of the forearm then upward in the arm to about its middle and is connected with the median vein by an anastomotic branch, medial cubital vein. It then
Vena hemizygous is a large unpaired vein situated on the left side of the roof of thoracic cavity. It arises from the first lumbar vein receives radicles from psoas muscles, runs forwards and downwards to the level of the 8th dorsal vertebra, partly in contact with the bodies of the vertebrae and partly in contact with
The anterior vena cava is formed by the union of the external jugular vein and brachial vein on either side. this is a large venous trunk receiving venous blood from the head, neck, fore limbs and a large part of the thoracic wall. It is about 10 to 14 cm long and it passes in
