Question

1. which statement best describes how the digestive system interacts with the circulatory system?

a) oxygen and carbon dioxide are exchanged by organs in the digestive system, and the gases are carried to the rest of the body by the circulatory system.
b) nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system.
c) messages sent as electrical impulses from the digestive system are transported throughout the body by the circulatory system.
d) nutrients and gases are absorbed by organs in the circulatory system. then, they are transported to all parts of the body by organs in the digestive system.

Explanation:

Step1: Analyze Option A

Oxygen and carbon dioxide exchange is mainly related to the respiratory system, not the digestive - circulatory interaction.

Step2: Analyze Option B

The digestive system breaks down nutrients (e.g., proteins into amino acids, carbohydrates into simple sugars). The circulatory system (blood) then transports these nutrients to various cells and tissues in the body. This shows the interaction between the digestive and circulatory systems.

Step3: Analyze Option C

Electrical impulses are mainly related to the nervous system, not the digestive - circulatory interaction.

Step4: Analyze Option D

Nutrients are absorbed by the digestive system (e.g., small intestine) and then transported by the circulatory system. The statement in D has the wrong order of absorption (should be digestive system first for nutrient absorption).

Answer:

B. Nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system.