Most arteries of the adult body carry oxygen-rich blood and the veins carry oxygen-poor blood. how does this differ in the pulmonary artieries and veins?

The normal oxygenated arteries and deoxygenated veins switches in the pulmonary artery and the pulmonary vein.

These are the only artery/vein combination that will be opposite within the body.

The pulmonary artery will carry DEoxygenated blood from the heart and into the lungs for diffusion/oxygen exchange

The pulmonary vein will carry OXYGENATED blood back to the heart after diffusion in the lungs happen.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.