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.
In the pulmonary circuit, the pulmonary veins transport blood from the lungs to the left atrium of the heart. This blood has a high oxygen content because it has just been oxygenated in the lungs. Systemic veins transport blood from the body tissue to the right atrium of the heart.