Prevailing winds and pressure belts are major climate controls. A belt of low pressure known as the intertropical convergence zone (ITCZ) lies along the Equator. On either side of the equatorial low, between 25Â° and 30Â° latitude in each hemisphere, is a belt of high-pressure centers over the oceans. From the equatorial side of these subtropical highssuch as the Hawaiian high.
The normal breathing rate for a 4 month old baby is between 30 and 60 breaths per minute.
Sleep requirements decline from infancy to early adulthood, level off, then decline again in old age. Stage 4 sleep increases in old age. Ten-year-olds are in REM sleep about 1.5-2 hours per night. Stage 4 sleep increases in old age.