What are the four main parts of the circulatory system?

a client has been prescribed misoprostol for the treatment of peptic ulcer disease. what is a true contraindication for this medication

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

What is responsible for the uneven heating between the poles and the equator on any given day