Pollution, burning fossils, undrinkable water
Sea snails help to keep the algae's population from growing to high. And the algae provides the sea snails with energy from the snails eating it as a food source.
The size of endotracheal tube that should be used to intubate a new born with an estimated gestational age of 26 weeks is 2.5 mm (internal diameter). An endotracheal tube serves as open passage through the upper airway. The purpose of endotracheal intubation is to permit air to pass freely to and from the lungs inorder to ventrate the lungs.
