The wren circulatory system consists of the jugular anastomosis, brachial veins, pectoral veins, superior vena cavae, inferior vena cava, hepatic vein, hepatic portal vein, coccygeomesenteric vein, femoral veins, sciatic veins, and the renal & renal portal veins.
The jugular anastomosis allows blood to flow from right to left side when the birds head is turned & one of the jugulars constricted.The jugular veins drain the head and neck.
The brachial veins drain the wings.
The pectoral veins drain the pectoral muscles and anterior thorax.
The superior vena cavae (or precavae) drain the anterior regions of the body.
The inferior vena cava (or postcava) drains the posterior portion of the body.
The hepatic vein drains the liver.
The hepatic portal vein drains the digestive system.
The coccygeomesenteric vein drains the posterior digestive system & empties in the hepatic portal vein.
The femoral veins drain the legs.
The sciatic veins drain the hip or thigh regions.
The renal & renal portal veins drain the kidneys.
The jugular anastomosis allows blood to flow from right to left side when the birds head is turned & one of the jugulars constricted.The jugular veins drain the head and neck.
The brachial veins drain the wings.
The pectoral veins drain the pectoral muscles and anterior thorax.
The superior vena cavae (or precavae) drain the anterior regions of the body.
The inferior vena cava (or postcava) drains the posterior portion of the body.
The hepatic vein drains the liver.
The hepatic portal vein drains the digestive system.
The coccygeomesenteric vein drains the posterior digestive system & empties in the hepatic portal vein.
The femoral veins drain the legs.
The sciatic veins drain the hip or thigh regions.
The renal & renal portal veins drain the kidneys.