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.
How many ounces should he get? A: It's tough to judge exactly how many ounces of breast milk your baby consumes when he's nursing, but for the first month or so, babies usually drink about 2 ounces per feeding. However, this varies from baby to baby (larger babies tend to eat more, for example) and even from feeding to feeding. You can start with 2 ounces, and if your baby devours it and seems eager for more, offer another ounce. Don't worry about overstuffing your baby -- he'll stop when he's full.