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.
In the first week, formula-feed your newborn on demand. After that, it's important not to overfeed your baby so he'll stay at a healthy weight. Most new babies want to eat every few hours. Start with 1.5 to 2 ounces at each feeding for the first week, and work up to 2 to 3 ounces every three to four hours.As your baby gets older â and his tummy gets bigger â he'll drink fewer bottles a day with more formula in each.By about 1 month, for example, he may be down to five or six bottles of 4 ounces every 24 hours.ow much formula by babyâs weight. In the first four to six months when your baby isn't eating any solids, here's a simple rule of thumb: Offer 2.5 ounces of formula per pound of body weight each day.