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 Human circulatory system is an organ system that is mainly concerned with transportation of nutrients, gases, blood cells and hormones throughout the body, through a network of blood vessels. It is also the main cooling as well as transportation system of the body. The RBCs carry nutrients and oxygen to the cells while the white blood cells in the circulatory system act as cleaners and start functioning whenever we are exposed to cold, infection or cut. The main components of circulatory systems are arteries and veins.