How does the digestive and circulatory system work together to supply nutrients and energy to the body's cells.?

Answer 1

You breathe in air through your lungs. This air travels to the alveoli in your lungs. There are capillaries in your alveoli. The oxygen in the air gets absorbed by the body while the waste product (CO2), gets expelled from your body. The digestive system breaks your food down into a substance small enough to be absorbed by the body. Glucose which is one substance the food is broken down into travels, as well as the oxygen, through the circulatory system to the cells. The oxygen and glucose react in the cells to make energy.

That is how they all work together.

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Just to reword that answer:

When you breathe in air (inhale) you are also breathing in oxygen. That oxygen travels down into your lungs and into small air sacs called alveoli. These small air sacs are surrounded by capillaries carrying oxygen-poor blood. This blood has carbon dioxide in it which is a waste product produced during cell activities.

Now, when this oxygen is in your alveoli the oxygen diffuses through the thin membranes of the alveoli into the surrounding capillaries. Then the carbon dioxide from the blood in the capillaries diffuses into the alveoli. When you exhale the carbon dioxide in the alveoli are released into the air. That was the respiratory part--now the circulatory system comes into play.

That blood which is now oxygen-rich needs to be circulated throughout the body because your body cells need the oxygen to perform its cell activities. And so, blood is transported through the capillaries to the many cells in your body. These capillaries do not only circulate oxygen rich blood-it also circulates glucose. After cells use this oxygen and glucose and carbon dioxide is released as a waste product into the blood. That blood is brought to the lungs through the superior and inferior vena cava, into the right atrium, through the right ventricle, through the semi-lunar valves, and into the lungs. It is here where the oxygen-poor blood full of carbon dioxide becomes oxygen-rich with the help of the alveoli and such.

Here we come to a full close between the respiratory and circulatory system.

--Hope that helps :)

Answer 2

The common factor is the delivery of nutrients and prerequisites of metabolism to the different parts of the body and the removal of by products of metabolism out of the body. Without oxygen and food we would die and in the absence of excretion of urea and carbon dioxide we would die from the toxic effects of our own waste.

The main way in which the respiratory and the circulatory system work together is that the heart send blood to the lungs, which is then oxygenated, so the blood can then be sent to the rest of the body (after being pumped back through the heart).

The digestive system work with the circulatory system by immediatly in the small intestine absorb the nutrients from our food and to put them to use but this is after the nutrients are broken down further by the liver (via the heptic portal) which is the first port of call for nutrients absorbed from the intestine. Also without the heart-beat from the circulatory system, there wouldn't be any peristalsis which in turn won't push the food down into the digestive system (without force), wouldn't churn our food properly, makes absorption of food harder and would make expulsion of any waste we produce in the Large Intestine almost impossible.

Answer 3

The digestive, respiratory, and circulatory system depend on each other. The food that is digested is broken down into its base nutrients. From there, the circulatory system absorbs those nutrients, and the respiratory system helps fuel the metabolism of those nutrients through the blood.