The radiation pattern. depends on the number and the type of elements be-. ing used, and the physical and electrical structure of. the array. Numerous variations of antenna structures, as well as the type of elements are available, but for. simplicity only one kind of element is used in the. whole array structure [2].
However, organ is a group of organized tissues performing specific or group of functions. â¢ Gland always secretes substances but not all the organs secrete substances. â¢ Gland is always a tubelike structure but organ is not always in that nature. Ex: liver is a dense organ but stomach is a hollow organ.
Difference Between Exocrine Glands and Endocrine glands. The endocrine system controls the body activities by producing chemical substances called hormones are chemical messengers, secreted by ductless gland known as endocrine glands. Exocrine gland secrete their products into ducts or channels, that carry them either to the outside of the body or into body cavities. Some glands like pancreas perform both exocrine and endocrine functions.