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.
The pulmonary circulation is a short loop from the heart to the lungs and back again, and the systemic circulation sends blood from the heart to all the other parts of our bodies and back again.The heart is the key organ in the circulatory system.