1 An ad hoc network is a local area network (LAN) that is built spontaneously as devices connect. 2  Ad hoc testing is an informal and improvisational approach to assessing the viability of a product. 3  Ad hoc analysis is a business intelligence process designed to answer a single, specific business question.
The circulatory system and immune system serve the same, yet complementary purpose, to keep the entire body alive. The circulatory system does this by delivering oxygen from the lungs to every organ and cell in the body. The immune system does this by consuming foreign substances before they can damage the body. The connection between the circulatory system and immune system lies in the fact that the immune system travels through the entire body, inside the circulatory system. The circulatory system has three major components: the heart, the lungs, and blood vessels.
The endocrine system consists of various glands that secrete hormones and local regulators that effect numerous different types of cells. One such gland that interacts with the circulatory system is the adrenal cortex. The adrenal medulla (and adrenal cortex) is located just above the kidneys.nother gland, called the thymus, secretes hormones that directly interact with the immune system. The two specific lymphocytes, B and T cells, both begin development as stem cells in the red bone marrow.