| A | B |
|---|
| Lymphatic System | System that supports immune defence and drains and returns excess fluid and protein to the bloodstream to help maintain fluid balance |
| Lymph | Fluid collected from tissues and transported through lymphatic vessels |
| Interstitial Fluid | Fluid that remains in tissues after plasma leaves capillaries |
| Lymphatic Vessel | Vessel that transports lymph through the body; movement relies on valves, muscle contractions and breathing |
| Lymphatic Capillary | Small dead-ended tube that collects excess interstitial fluid from tissues |
| Right Lymphatic Duct | Duct that drains the head and right upper body |
| Thoracic Duct | Duct that drains the left upper body and the lower body |
| Lacteal | Specialized lymphatic capillary that absorbs dietary fats in the small intestine |
| Lymph Node | Bean-shaped structure containing lymphocytes and macrophages that filters lymph and traps harmful substances like bacteria, cancer cells and viruses |
| Lymphocyte | White blood cell important in immune response |
| Macrophage | Large phagocytic cell that engulfs pathogens and debris |
| Cervical Nodes | Lymph nodes located in the neck |
| Axillary Nodes | Lymph nodes located in the armpits |
| Mediastinal Nodes | Lymph nodes located in the chest |
| Mesenteric Nodes | Lymph nodes located in the abdomen |
| Paraaortic Nodes | Lymph nodes located near the aorta in the abdomen |
| Inguinal Nodes | Lymph nodes located in the groin |
| Spleen | Largest lymphatic organ found in the left upper abdomen that supports immunity, filters blood, recycles worn out erythrocytes, and stores extra platelets and erythrocytes |
| Thymus | Mass of lymphatic and glandular tissue where T lymphocytes develop and mature; most active during childhood and adolescence |
| T-Lymphocyte | Type of white blood cell involved in recognizing self and non-self cells and substances |
| Self | Body's own cells recognized as normal by the immune system |
| Non-self | Foreign substances recognized by the immune system |
| Tonsil | Mass of lymphoid tissue in the pharynx and nasal passages; monitors and responds to inhaled or ingested pathogens |
| Lymphoid Tissue | Tissue rich in lymphocytes that supports immune defense |
| Pharynx | Throat region that connects nasal and oral cavities |
| Waldeyer's Ring | Circular arrangement of tonsillar tissue around the pharynx |
| Pharyngeal Tonsils | Tonsils located at the top of the pharynx behind the nose |
| Adenoids | Another name for the pharyngeal tonsils |
| Tubal Tonsils | Tonsils located near the Eustachian tubes |
| Palatine Tonsils | Tonsils located at the back of the mouth |
| Lingual Tonsils | Tonsils located at the base of the tongue |
