5.THE HUMAN BODY IS MADE UP OF ORGAN SYSTEM THAT WORK TOGETHER AS ONE UNIT.WHICH BODY SYSTEMS WORK TOGETHER TO PREPARE AND DISTRIBUTE FOOD FOR CELLS
A.DIGESTIVE AND CIRCULATORY C.NERVOUS AND EXCRETORY
B.NERVOUS AND RESPIRATORY D.DIGESTIVE AND ENDOCRINE

6.WHICH HUMAN BODY SYSTEM ARE MOST DIRECTLY INVOLVED WHEN APERSON IS WALKING
A.EXCRETORY AND RESPIRATORY C.CIRCULATORY AND ENDOCRINE
B.DIGESTIVE AND REPRODUCTIVE D.MUSCULAR AND NERVOUS