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 Photo A shows a tadpole. Photo b shows a frog that has developed legs but still has the tail of a tadpole. Photo C shows a fully grown frog.
The process of amphibian metamorphosis, as seen in the tadpole-to-frog stages shown here, is driven by hormones. (credit "tadpole": modification of work by Brian Gratwicke)

An animal’s endocrine system controls body processes through the production, secretion, and regulation of hormones, which serve as chemical “messengers” functioning in cellular and organ activity and, ultimately, maintaining the body’s homeostasis. The endocrine system plays a role in growth, metabolism, and sexual development. In humans, common endocrine system diseases include thyroid disease and diabetes mellitus. In organisms that undergo metamorphosis, the process is controlled by the endocrine system. The transformation from tadpole to frog, for example, is complex and nuanced to adapt to specific environments and ecological circumstances.

Questions & Answers

what is bilateral symmetry
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which part of the alimentary canal were these cross section taken
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what is alimentary canal were these cross section taken
Getrude
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from which part of the alimentary canal were these cross section taken fig 2.1 fig 2.2 b,c
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explain the role played by b in the alimentary canal
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structure of a kidney
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Chinyi Reply
The study of all life or living matterThe living organisms of a particular region.
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what is ology
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in which of the following stages of the cell cycle are chromosomes pulled apart to opposite poles of the cell
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Anaphase
Jonah
what is digestive system
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Digestive system is a system in mammals associated with the breaking down or assimilation of food substances into simple soluble and diffusable substances by mechanical and chemical means
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what is symbiotic factors of an organisms
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Source:  OpenStax, Biology. OpenStax CNX. Feb 29, 2016 Download for free at http://cnx.org/content/col11448/1.10
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