1. What is the difference
between the endocrine gland
and the exocrine gland?

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Endocrine gland is a whose
secretions (called hormones)
collected by the blood reach the
tissues through circulation. The
hypophysis (pituitary) the adrenals
are examples endocrine glands.
Exocrine gland a gland whose
secretions released externally
through ducts ( the skin, intestinal
lumen, , etc.). The sebaceous
glands the salivary glands are
of exocrine glands.