Interconnected porosity is a network of pores on a coating surface. There are two kinds of porosity - open and closed: Open porosity, also known as interconnected porosity, is the ratio of the volume of void space within the material that is accessible from the exterior to the bulk volume.
30.1 Respiratory and Circulatory Functions Oxygen-poor blood Oxygen-rich blood The respiratory and circulatory systems work together to maintain homeostasis. â¢ The circulatory system transports blood and other materials. âbrings supplies to cells âcarries away wastes âseparates oxygen-poor and oxygen-rich blood
1 Students should know the parts and functions of the circulatory and respiratory systems and how they work together for respiration. 2  Students should also understand what homeostasis is and that all living things must be able to maintain homeostasis.