Chronic type of arthritis that affects multiple joints of the body

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.

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

In what part of the body does the most muscle activity happen?