What two systems regulate the activities of all the systems that make up the human body?

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

the growth of the plants is affected by the heat of the light. what is the student doing?