The correct answer is a. Liver.
Explanation:
Nutrient-rich blood from the gut first passes through the liver for further processing because the liver plays a crucial role in metabolizing and processing nutrients absorbed from the digestive system. After food is digested in the stomach and small intestine, the nutrients are absorbed into the bloodstream through the walls of the intestine. The blood then carries these nutrients to the liver through the hepatic portal vein.
Once in the liver, various metabolic processes occur, including:
1. Detoxification of harmful substances: The liver helps detoxify harmful substances, such as alcohol and drugs, by breaking them down into less harmful compounds.
2. Storage and release of glucose: The liver stores excess glucose as glycogen and releases it into the bloodstream when blood sugar levels drop.
3. Synthesis of proteins: The liver synthesizes important proteins, such as albumin and clotting factors, which are essential for maintaining proper bodily functions.
4. Bile production: The liver produces bile, a substance that aids in the digestion and absorption of fats in the small intestine.
Overall, the liver acts as a central processing unit for nutrients, toxins, and other substances absorbed from the digestive system before they are distributed to the rest of the body. Therefore, nutrient-rich blood from the gut first passes through the liver for further processing.
