The vagus nerve and the heart. Fibres of the vagus nerve (right/bottom of image) innervate the sinoatrial node tissue (central and left of. image). H&E stain. Parasympathetic innervation of the heart is mediated by the vagus. nerve. Specifically, the vagus nerve acts to lower the heart rate.
1 An 8-pound newborn drinks about 2 ounces at a time, roughly 10 times a day. 2  A 14-pound 4-month-old drinks 4 to 5 ounces at a time about six to eight times a day.  A 16-pound 6-month-old drinks 5 to 6 ounces at a time, roughly five times a day, in addition to eating some baby food.
However, as the baby grows, the capacity to consume milk increases from 1 oz. on the first postnatal day to up to 10-12 oz. daily by week 2 and 3. By the end of week 4, the baby can ingest and digest up to 25 oz. to 30 oz. of milk daily. 1 to 6 months. The average consumption of breast milk by 1 month is approximately 25 oz. (ranging from 21 to 30 oz.) and it remains the same almost throughout the first six months of postnatal life.