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.
Science Main Index. Glands are organs in the body that release hormones. Hormones are chemical messengers the help regulate bodily functions. In the digestive system, hormones regulate functions such as enzyme and gastric juice production used in the breakdown of fats, proteins, and carbohydrates.