- Nutrients are a kind of simple substance
- Food contains nutrients for living things
- So, food contains simple substances in the form of nutrients

- Food contains simple substances in the form of nutrients
- The breaking down of food into simple substances occurs in the digestive system
- So, the digestive system breaks down food into nutrients for the body

- Food is a kind of substance
- Digestion is when food is absorbed into the blood stream
- Hence, food is a kind of substance that is absorbed into the blood stream

- Food is a kind of substance that is absorbed into the blood stream
- Blood is a vehicle for carrying substances
- Hence, blood is a vehicle for carrying food

- Blood is a vehicle for carrying food
- The circulatory system transports blood throughout the body
- Therefore, the circulatory system carries food from the digestive systems throughout the body

- The digestive system breaks down food into nutrients for the body
- The circulatory system carries food from the digestive systems throughout the body
- So, the digestive system and the circulatory system help to break down food and carry it throughout the body

- The digestive system and the circulatory system help to break down food and carry it throughout the body
- Cells are a part of the body
- Therefore, the digestive system and the circulatory system help to break down food and carry it to the body's cells

So, the digestive system and the circulatory system help to break down food and carry it to the body's cells
Q: The human body is made up of organ systems that work together as one unit. Which systems work together to prepare and distribute food for cells?
Context:
- The circulatory system transports blood throughout the body 
- Food is a kind of substance 
- Nutrients are a kind of simple substance 
- Blood is a vehicle for carrying substances 
- The breaking down of food into simple substances occurs in the digestive system 
- Digestion is when food is absorbed into the blood stream 
- Cells are a part of the body 
- Food contains nutrients for living things