What does the lymphatic system drain from tissues?

The lymphatic system is primarily responsible for draining lymph from tissues. Lymph is a clear fluid that originates from the interstitial fluid surrounding cells and contains proteins, nutrients, and waste products. The main function of the lymphatic system is to maintain fluid balance in the body by collecting excess fluid that escapes from blood vessels and returning it to the circulatory system. Additionally, the lymphatic system plays a crucial role in immune response by transporting lymph that carries white blood cells, which help to fight off infections.

Oxygen and carbon dioxide are gases that are exchanged in the respiratory system, not drained by the lymphatic system. Blood is part of the circulatory system and is involved in the transportation of gases, nutrients, and waste products, whereas the lymphatic system complements this by managing fluid and immune responses in tissues. Thus, the lymphatic system specifically drains lymph from tissues, making this the correct answer.