What is not representative of endocrine glands?

" Ducts" is not the representative of endocrine glands.

Explanation:

The secretion of the endocrine glands are directly released into the blood stream . For this reason they can travel long distances and can reach any organ travelling through the blood in the body through different co-ordinate activity. Hence, ducts of the endocrine glands are not present to take their secretion to the target organ. They are mostly vascular in nature and they have intracellular vacuoles or may say granules that can easily store their hormones.

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.