The best way to beat this problem is to replace the return jets with a ninety degree setup that had a larger opening than the eyes that you find in the return jets. these can still be pointed downwards, along the wall of the pool and give very good control over the direction of the pools currents, which in turn gives you more control over the skimming.
venous circulation
Blood is bright red when it returns to the heart from the lungs. It is darker red when it returns to the right atrium from the systemic circulation.
venae cavae
Thoracic duct
left thoracic duct
The purpose of systemic circulation is to carry blood from the heart to the body. It then returns the blood back to the heart.
it reabsorbs cerebrospinal fluid and returns it to the venous circulation
It depends on the temperature scale you're using. In Fahrenheit, water returns from gas to liquid at 32 degrees. In Celsius, it returns at 0 degrees. And, in Kelvin, it returns to liquid at 273 degrees.
Blood returning from pulmonary circulation returns to the right atrium via the pulmonary vein. Blood returning from the systemic circulation returns to the right atrium via the Vena Cava.
Pulmonary - carries oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart. Systemic - carries oxygenated blood away from the heart to the body, and returns deoxygenated blood back to the heart.
Renal circulation, receiving about 20% of cardiac output, branches from the abdominal aorta and returns to the ascending vena cava. Hepatic circulation is the system of veins made of the hepatic portal vein and its tributaries.
Right atrium