Employers of California employees covered by the rest period provisions of the Industrial Welfare Commission Wage Orders must authorize and permit a net 10-minute paid rest period for every four hours worked or major fraction thereof. Insofar as is practicable, the rest period should be in the middle of the work period.
Blood takes a very precise route during pulmonary circulation. Two large veins called the vena cavae bring blood to the right atrium of the heart. The atrium fills with the waste-rich blood and then contracts, pushing the blood through a one-way valve down into the right ventricle.
After it has become deoxygenated, it goes through the veins back to the heart, where the process starts all over again. Pulmonary Circulation Pulmonary circulation is the part of the cardiovascular system which carries deoxygenated blood away from the heart, to the lungs, and returns oxygenated blood back to the heart. It is what the Pulmonary Artery and the Pulmonary Veins do.