Answer:
1- Heart: the heart is in charged of pumping blood around your whole body, this is thanks to the way the heart beats, the heart beats are that make this possible. This blood sends oxygen and nutrients to all parts of your body, and carries away unwanted carbon dioxide and waste products.
2- Joint: is the part of the body where two or more bones meet to allow movement. Every bone in the body except for the hyoid bone in the throat meets up with at least one other bone at a joint.