Which lists three units of an organ system in order from the simplest to the most complex? red blood cell → heart → tissue skeleton → bone → bone cell muscle cell → muscle tissue → stomach lung tissue → lung → circulatory system

C.  muscle cell → muscle tissue → stomach

Explanation:

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a. to encourage apoptosis

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.