Because of the infant's enormous body surface to weight ratio and the obvious disparity in core and skin temperatures, heat loss in the newborn predominantly happens through radiation, convection, and conduction. A newborn's mechanism for producing heat is nonshivering thermogenesis.
Ingenious systems for controlling body temperature are present in newborns. Neonatal thermoregulation, which is controlled in the hypothalamus and mediated by endocrine pathways, is a vital function for neonatal survival. Thermogenesis that occurs during shivering and non-shivering during hypothermia stimulates cellular metabolism.
A newborn's blood pressure should be quite low, between 60 and 70 over 35 to 50. heartbeat.
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