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.
Each side consists of an atrium, which receives blood from the pulmonary veins, and a ventricle, which propels the blood into the arteries. The heart is situated more in the left side of the thorax than in the right (see figs. 23-4 and 23-21). The adjective cardiac is derived from the Greek kardia, heart.