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Illusion [34]
3 years ago
10

Vertebrates have an endocrine system of glands that secrete _____.

Biology
1 answer:
MatroZZZ [7]3 years ago
5 0
Hormones because if you think about it. Vertebrates must have backbones and mammals have them. And, humans are basically mammals. And the glands secrete hormones.
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