Although there are eight major endocrine glands scattered throughout the body, they are still considered to be one system, the endocrine system because they have similar functions, similar mechanisms of influence, and many important interrelationships. The eight major endocrine glands are: ova and sperm. Some organs, such as the stomach, intestines, and heart, produce hormones, but their primary function is not hormone secretion.
Related category• ANATOMY AND PHYSIOLOGY
Source: National Cancer Institute
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