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.
Differences Between Endocrine vs Exocrine Glands Gland is a specific structure which secrets various chemical substances such as enzymes, hormones, and metabolites. There are two types of glands in the body called endocrine glands and exocrine glands. Throughout the embryo development, endocrine glands lack ducts and remain as blocks of tissue. So, it secrets chemical substances directly to the blood stream, while exocrine gland secrets its product into a duct.