The diagram shows which structure of the nervous system? Dendrite
Axon
Myelin sheath
the meninges
a vertebra
a neuron
the cerebellum

C. a neuron

Explanation:

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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.

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