[HLTH 220] - Final Exam Guide - Comprehensive Notes for the exam (80 pages long!)

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Quickly develop increasingly stable patterns in basic activities. Avg newborn: just over 7 lbs, 20 inches long. Infants grow rapidly over their first 2 years. Not all parts of infants body grow at same rate. At birth, the head accounts for 25% of entire body size. By age 2, head is only 20% By adulthood, head is only 12. 5% also gender and ethnic differences in weight and length. Asians smaller than caucasians; african americans bigger. In first days of life, body rhythms govern behaviour often at seemingly random times. The most basic activities are controlled by a variety of bodily systems. It takes time and effort for infants to integrate the separate behaviours to work in harmony. Rhythms repetitive, cyclical patterns of behaviour. Some are obvious change from wakefulness to sleep. Others are more subtle but easily noticeable breathing, sucking. Others are not easily noticed jerk legs every minute or so.