The six organs in the digestive system are the mouth, pharynx, esophagus, stomach, small intestine, and the large intestine. The circulatory system transports food, oxygen, and water to every system of the body through an intricate network of blood vessels. The muscle that helps you breathe is called the diaphragm. The three types of muscles in the muscular system are skeletal, smooth, and cardiac. The smallest muscle in the skeleton is the stapedius.
Vertebrates have a closed circulatory system.
The cardiac muscle makes your heart beat. My name is Karen Duke. I am working on my master's degree in curriculum and instruction. I work at Henry L. Barger where I teach second grade. I have been teaching for five years.