Answer:
Circulatory, Digestive & Respiratory.
Step-by-step explanation:
circulatory system:
The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
respiratory system:
The cells in our bodies need oxygen to stay alive. Carbon dioxide is made in our bodies as cells do their jobs. The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out.
Digestive system:
Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.