ABSTRACT
This chapter provides the key concepts of human body systems as they relate to rehabilitation engineering. Movements associated with specific joints are described in the following subsection on the muscular system. To understand how movement occurs around any joint, we have to understand the different roles that muscles assume during a certain joint motion. In cases when both the agonist and the antagonist are working at the same time it will result in a co-contraction, which usually occurs when we try to perform a movement that needs to be accurate and precise. Now, it is essential to understand how we control muscle contractions and movements in our body. The cardiovascular system primarily consists of blood, the heart, and all the associated blood vessels. A major function of the cardiovascular system is to work with the respiratory system to allow blood to transport carbon dioxide and oxygen.
