check this out | how do endocrine and exocrine glands differ

The main difference between endocrine glands and exocrine glands is that endocrine glands are ductless glands that secrete hormones into the blood whereas exocrine glands consist of ducts and they secrete enzymes. Hormones serve as chemical messengers which regulate the physiology and behavior.

The key difference between the two types is that, whereas exocrine glands secrete substances into a ductal system to an epithelial surface, endocrine glands secrete products directly into the bloodstream [1]. Exocrine secretions form in the acinus, a small cluster of cells at the origination of glandular ducts.

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