Which system is the digestive system least connected to? A)Nervous
B) Integumentary
C) Circulatory
D) Excretory

The system that the digestive system is least connected to is the Integumentary which is option B.

In the body, food is broken down into simple, soluble and diffusible substances by mechanical and chemical means through the digestive system.

The alimentary tract of the digestive system is connected to the nervous system. This is because the autonomic nervous system supplies nerves to the alimentary tract and this leads to:

The circulatory system is connected to the digestive system through blood supply from the arteries and blood drainage through the veins.

The excretory system is connected to the digestive system. this true because  the food substances that have been eaten but cannot be digested and absorbed are excreted from the alimentary canal as faeces by by the process of defecation.

The Integumentary system in an external part of the body which is involves  protection of the body. it dosen't play any role in the digestive system and so its least connected to it.

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1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)