Blood Supply

Left Gonadal Vein

Left Gonadal Vein The structure indicated is the left gonadal vein. The gonadal veins are the veins which drain the testes in men (testicular vein) and the ovaries (ovarian vein) in women.  The left gonadal vein drains into the left renal vein, which then drains into the inferior vena cava. The right gonadal vein however, drains directly into the inferior vena cava. The inferior vena cava is responsible for carrying deoxygenated blood into the right atrium of the heart from the lower part of the body. The inferior vena cava is formed at the point of union of the right …

Left Gonadal Vein Read More »

left gonadal vein

Internal Iliac Artery

Internal Iliac Artery The structure indicated is the internal iliac artery. The abdominal aorta bifurcates into the left and right common iliac arteries at approximately the level of the fourth lumbar vertebra. The common iliac arteries then divide into the external and internal iliac arteries. The internal iliac artery has an anterior trunk and posterior trunk. The branches of these trunks are anatomically variable and have several different configurations from person to person. The posterior trunk gives rise to three branches: Iliolumbar artery Lateral sacral arteries Superior gluteal artery The branches of the anterior trunk are much more variable, but …

Internal Iliac Artery Read More »

Internal iliac artery

Lumbar Veins

Lumbar Veins The lumbar veins are illustrated in this diagram. The lumbar veins run along the posterior abdominal wall and drain into the inferior vena cava. In addition some lumbar veins drain into the iliolumbar vein, and into ascending lumbar veins. There are several veins which drain into the inferior vena cava. The inferior cava is formed from the union of the common iliac veins, which receive blood from the pelvis and lower limbs. Draining directly into the inferior vena cava, are the following veins: Lumbar veins Right gonadal veins (ovarian/testicular) Renal veins Right suprarenal vein Inferior phrenic veins Hepatic …

Lumbar Veins Read More »

Lumbar veins

Renal Artery

Renal Artery The structure indicated is the right renal artery. The renal arteries are lateral branches of the abdominal aorta which arise at the level of the intervertebral disc between L1 and L2, just below the origin of the superior mesenteric arteries. There is one renal artery that supplies each kidney. The right renal artery tends to originate slightly lower than the left renal artery, and it passes behind the inferior vena cava to supply the right kidney. The renal arteries then divide into a few anterior and posterior branches at the hilum. The renal arteries can become narrowed, or …

Renal Artery Read More »

Right renal artery

Median Sacral Artery

Median Sacral Artery The structure indicated is the median sacral artery. The median sacral artery arises just above the bifurcation of the aorta into the common iliac arteries. The abdominal aorta gives off anterior, posterior and lateral branches. The anterior branches include: Celiac trunk Superior mesenteric artery Gonadal arteries Inferior mesenteric arteries Lateral branches: Middle suprarenal arteries Renal arteries Posterior branches: Inferior phrenic arteries Lumbar arteries Median sacral arteries The median sacral artery supplies the coccyx, the lumbar vertebrae and the sacrum.
medial sacral artery

Right Coronary Artery

Right Coronary Artery The structure indicated is the right coronary artery of the heart. The coronary arteries arise from the aortic sinuses of the ascending aorta. The right coronary artery (RCA) arises from the right aortic sinus and the left coronary from the left aortic sinus. The right coronary artery then runs in the coronary sulcus, which separates the atria from the ventricles. The right coronary artery gives off the following branches: Atrial arteries Right marginal branch Posterior interventricular branch (posterior descending artery) The coronary artery from which the posterior descending artery arises determines the coronary dominance. The posterior descending artery …

Right Coronary Artery Read More »

right coronary artery

Vertebral Artery

Vertebral Artery The structure indicated is the vertebral artery. The vertebral arteries arise from the first part of the subclavian artery. Two other arteries are given off from the first part of the subclavian artery – the internal thoracic artery and the thyrocervical trunk. The vertebral and internal carotid arteries provide the arterial supply to the brain, forming the Circle of Willis at the base of the brain. After the vertebral artery is given off from the subclavian artery, it passes through the transverse foramina of cervical vertebrae C1 to C6. It then enters the skull via the foramen magnum. …

Vertebral Artery Read More »

vertebral artery

Splenic Artery

Splenic Artery The structure indicated is the splenic artery. The splenic artery is one of three branches of the celiac trunk, which is the first anterior branch that arises from the abdominal aorta. The abdominal aorta consists of anterior, posterior, and lateral branches. There are three anterior branches which supply the foregut, midgut and hindgut structures these are as follows: Celiac trunk – supplies foregut Superior mesenteric artery – supplies midgut Inferior mesenteric artery – supplies hindgut The celiac trunk arises from the abdominal aorta at the level of the upper part of the first lumbar vertebra. It gives rises …

Splenic Artery Read More »

splenic artery

Common Hepatic Artery

Common Hepatic Artery The structure indicated is the common hepatic artery. The common hepatic artery is one of three branches of the celiac trunk and is the first anterior branch that arises from the abdominal aorta. The abdominal aorta consists of anterior, posterior, and lateral branches. There are three anterior branches which supply the foregut, midgut and hindgut structures these are as follows: Celiac trunk – supplies foregut Superior mesenteric artery – supplies midgut Inferior mesenteric artery – supplies hindgut The celiac trunk arises from the abdominal aorta at the level of the upper part of the first lumbar vertebra. …

Common Hepatic Artery Read More »

common hepatic artery

Atrial Arteries

Atrial Arteries The structures indicated are the atrial branches of the right coronary artery. The atrial arteries come off the right coronary artery to supply the right atrium of the heart. The atrial arteries are often describes in terms of three groups: Anterior Lateral Posterior The anterior and lateral branches mainly supply the right atrium, whereas the posterior branch supplies both the right and left atria. Learn more about the blood supply to the heart in this anatomy tutorial.
atrial arteries