1. Circulatory system; transports oxygen, waste, nutrients, hormones, heat, and other substances around the body. 2. Respiratory system; responsible for gaseous exchange, that is it brings oxygen into the body and gets rid of carbon dioxide. 3. Endocrine system; controls the body functions using chemicals messengers known as hormones. 4. Skeletal system; provides shape and structure to the body and allows for movement, protects vital organs and produces blood cells. 5. Nervous system; receives incoming information and sends messages to the body about how to respond. 6. Immune system; fights disease or infections causing pathogens such as viruses, fungi, and bacteria. 7. Digestive system; Breaks down food into smaller molecules and absorbs these nutrients into the body. 8. Reproductive system; produces sex cells, produces sex hormones and nurtures the unborn baby. 9. Muscular system; allows for movement of the body and keeps the head in position and also provides heat. 10. Urinary system; Cleanses the blood, gets rid of body wastes and maintains salts and water balance.
Puerto Rico might be on a plate boundary. When two plates slide against each other (also called a transform boundary) they can cause a earthquake to happen on the surface.
