Fewer nutrients are found at the headwaters of a river where the flow of water begins, yet there are still organisms that live in that part of the river system. How might nutrients make their way from downstream to the upstream headwaters of the river?

A3 year-old is brought to the burn unit after pulling a pot of hot soup off the stove and spilling it on herself. she sustained 18% second degree burns on her legs and 20% third degree burns on her chest and arms. total body surface area burned is 38%. what icd-10-cm codes are reported for the burns (do not include external cause codes for the accident)?