• Feb 3, 2026 bi107 human anatomy and physiology lymph nodes, lymph vessels, spleen, and thymus. Functions: Drains excess fluids. Defends against pathogens. Absorbs fats from the digestive system. 7. Respiratory System Includes lungs, trachea, bronchi, and diaphragm. Functions: Facilitates gas exchange (oxygen in By Dr. April Reinger
