Which system breaks down food so it can be absorbed into the blood? Digestive System Nervous System Respiratory System Cardiovascular System

## Step 1<br />The question asks which system in the human body is responsible for breaking down food so it can be absorbed into the blood. The options provided are the Digestive System, Nervous System, Respiratory System, and Cardiovascular System.<br /><br />## Step 2<br />The Digestive System is responsible for breaking down food into nutrients, which are then absorbed into the bloodstream. This process involves several organs, including the mouth, esophagus, stomach, and intestines.<br /><br />## Step 3<br />The Nervous System is responsible for transmitting signals between different parts of the body. It does not directly participate in the digestion of food.<br /><br />## Step 4<br />The Respiratory System is responsible for the exchange of gases, such as oxygen and carbon dioxide, between the body and the environment. It does not directly participate in the digestion of food.<br /><br />## Step 5<br />The Cardiovascular System is responsible for circulating blood throughout the body. While it does transport nutrients absorbed from the digestive system, it does not break down food.