16. Which of the following is formed when a group of tissues works together to perform a common function?
O A. Brain
OB. Organ
O C. Organ system
O D. Body

The organ system

Explanation:

An organ is composed of tissue and performs a specific set of functions for the body. And that’s called the organ system

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.