We are the most amazing organism of all living things who carries out some functions. The Organ Systems are interdependent, interconnected, and packaged processes that allow them to carry out activities to remain in the living condition. together in a relatively small space. Animals are complex organisms with systems and Activity 1 Name what kind of organ system is in the picture. Choose your answer in the box below. Muscular system
Skeletal system
Endocrine system
Respiratory system
Nervous system
Immune system
Digestive system
Circulatory system
Urinary system