Apatient has a rare genetic disorder that causes their heart to not "squeeze" well. this causes fluid to back up in the lungs, making it difficult for the patient to breath. doctors prescribe "water pills" which cause the patient to urinate extra fluid. which answer best summarizes the main body systems described in this example?
a. nervous, muscular, and skeletal systems
b. circulatory, respiratory, and excretory systems
c. circulatory, excretory, and integumentary systems

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.