The layer of the gi tract contains blood vessels, so it can be the site of an inflammatory response that leads to inflammatory bowel disease.

The submucosa layer of the GIT contains blood vessels,so it can be the site of inflammation that leads to inflammatory bowel disease.

Explanation:

GIT has four layers , 1) mucosa the innermost layer 2) submucosa that is a layer of loose connective tissue that surrounds the mucosa. This layer also contains blood vessels, lymphatic vessels, and nerves. Glands may be embedded in this layer. 3) muscularis propia containing circular and longitudnal muscles 4)adventitia

As long as the blood vessels of the GIT are related, ischemia can cause inflammation that may lead to inflammatory bowel disease.

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4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."