B.Directions: Analyze which TWO systems are involved in each item. Encircle the two systems involved in the given activities.
1. The lungs deliver oxygen to the blood, which transports it to all the cells in the body.
Circulatory System
Nervous System
Digestive System
Respiratory System
2. When you exercise you breathe in and out faster to provide more oxygen to the muscle cells, which are working har
Digestive System
Nervous System
Musculoskeletal System
Respiratory System
3. Blood is delivered to the kidneys where it is cleaned of wastes.
Circulatory System
Excretory System
Digestive System
Respiratory System
4. The brain controls the muscles that control breathing in and out.
Circulatory System
Nervous System
Digestive System
Respiratory System
5. The bladder sends messages to the brain when it is full. The brain controls the muscles of the bladder.
Digestive System
Nervous System
Excretory System
Respiratory System​