Hormones are secreted by glands in the human body. The hormones control different functions of the body by targeting specific organs and controlling the way their cells work. Which organ system is made of these hormone-producing glands?

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.