Unlike the more typical way of being intubated or put on a breathing tube in their mouth, this premature baby has the ventilator tube in his nose.
A ventilator can be necessary for premature babies who have premature lungs, infections, or who are having a lot of apnea, among other conditions.
The wires on his chest include a temperature probe to help regulate his temperature (the found shiny thing on his chest) and probes to monitor his heart rate and respiratory or breathing rate.
He also likely has an IV going into his umbilicus or belly button, where you can see the folded tape and he has an IV going into his arm. The IVs are used to give him fluids and medicines.