- The first column is blank, so the name of the body system should be "Lymphatic System".
- The main function of the Lymphatic System is to help the body fight infection and kill germs.
- The main organ involved in the Lymphatic System is the spleen.
- The main function of the Circulatory System is to transport oxygen and nutrients around the body.
- The main organ involved in the Circulatory System is the heart.
- The main function of the Digestive System is to break down food into nutrients.
- The main organ involved in the Digestive System is the small intestine.
- The main function of the Excretory System is to remove waste from the body.
- The main organ involved in the Excretory System is the kidney.
Parent Tip: Review the logic above to help your child master the concept of human body systems middle school worksheet.
