Trace a molecule of food as it moves through the digestive system and is absorbed into the blood stream. Describe what happens at each stage of the digestive process.

1. Trace a molecule of food as it moves through the digestive system and is absorbed into the blood stream. Describe what happens at each stage of the digestive process.

2. The liver is known for its ability to remove certain toxins from the blood. It can perform this function because its cells, or hepatocytes, contain large quantities of lysosomes and peroxisomes, and also have an extensive smooth endoplasmic reticulum. Briefly describe how these three organelles contribute to this major function of the liver.

3. The liver has a portal vein as well as a hepatic vein. It also has unique exchange blood vessels similar to capillaries, called sinusoids. How do these unique structures determine the function of the organ?

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