Compare and contrast a system found within the human body, such as the circulatory system or
digestive system, to an ecosystem. What
characteristics make each of these a system?
What is the benefit of using a systems approach
to studying both the human body and complex
ecosystems? (Use the best explanation to receive
the most points)
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it takes hundreds of years to become stable.

if you have another question lmk.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]