Which system transports fat-soluble nutrients in the body?

The lymphatic system is responsible for transporting fat-soluble nutrients in the body. When fats are consumed, they are emulsified by bile in the digestive system and then absorbed through the intestinal lining. Once absorbed, these fat-soluble nutrients (like vitamins A, D, E, and K) are packaged into chylomicrons—lipoprotein particles—and released into the lymphatic system. This system then transports these nutrients to the bloodstream, where they can be distributed to cells throughout the body.

The circulatory system mainly deals with the transportation of water-soluble nutrients, hormones, oxygen, and carbon dioxide, but it is not the primary pathway for fat-soluble nutrients. The endocrine system is involved in hormone signaling and regulation rather than nutrient transport. The digestive system is crucial for the breakdown and initial absorption of food but does not specifically handle the transport of fat-soluble nutrients beyond the point of absorption. Thus, the lymphatic system is the correct answer for the transport of fat-soluble nutrients.