Oy oy oy o

Response Response Response

Receptor Receptor Hormone Receptor released

Figure 3 Hormone systems. (a) Autocrine hormones affect the cell that secreted them. (b) Paracrine hormones affect local tissues. (c) Endocrine hormones are transported in the circulatory system to affect distant organs.

function to synchronize and induce reproductive activity, and to define territorial boundaries.

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Worm Farming

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