Practice 1: Fill in the blank
The immune system consists of two main parts or system One system works 24/7 and protects your
regardless of what type of microorganismis encountered. What system is this ?

one the blank: body

And is the innate immune system

Explanation:

There are 2 system, the innate and the adaptive, the innate provides a general defense against harmful germs and substances, and the adaptive creates antibodies to fight that germs.

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.