Which system carries fats from the intestines to the bloodstream in addition to helping the immune system?

• A. Lymphatic System
• B. Circulatory System
• C. Respiratory System
• D. Digestive System

Answer: (A)

Fat absorption from the gut occurs through the lymphatic system because the fatty particles, or chylomicrons, are too large to enter blood capillaries directly. After fats are reassembled in intestinal cells, they enter lymphatic capillaries called lacteals in the intestinal villi. The lymphatic network then transports these fat-rich particles and drains into the bloodstream via the thoracic duct and the left subclavian vein. Along with its transport role, the lymphatic system centers immune defense, with lymph nodes and immune cells filtering lymph. So, it uniquely handles moving fats from the intestines into the bloodstream while also supporting immunity. The circulatory system does carry fats once they’re in the blood, but the initial transport from the gut is through the lymphatic system, whereas the respiratory and digestive systems aren’t the primary routes for this fat transfer.