Many adults living in the US become curious about doctor prescribed growth hormone replacement therapy when they begin to experience chronic symptoms, such as low energy, fatigue and low sex drive, that are frequently associated with your bodyâs declining growth hormone levels.
External, or exocrine, secretion is distinguished from internal, or endocrine, secretion. In external secretion the products elaborated by a gland are released into the external environment; the secretion first enters the glandular duct, from which it is discharged onto the surface of the body or into hollow organs.
Endocrine and exocrine glands are different in that endocrine glands do not have ducts to carry their secretions to specific locations.Exocrine glands usually secrete their products (not hormones or other chemical messengers) into the external environment, while the endocrine glands secrete hormones into the body.Some examples of exocrine glands are sweat glands, salivary glands,ndocrine and exocrine glands are different in that endocrine glands do not have ducts to carry their secretions to specific locations.