MCAT Basics (from MedSchoolCoach) The Lymphatic System
Jun 12, 2025
Explore the fascinating world of the lymphatic system, diving into its structure and pivotal roles. Learn about lymphatic vessels, nodes, and key organs like the bone marrow and thymus. Discover how this system supports immune function, fluid balance, and nutrient absorption, including fat-soluble nutrients. Delve into the immune surveillance process and the unique function of the spleen. Lastly, hear intriguing insights on the emerging brain-lymphatic connection and its potential implications for cognition!
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Three Core Functions Of The Lymphatic System
- The lymphatic system returns fluid to blood, supports immunity, and absorbs fats and fat-soluble nutrients.
- It consists of vessels, nodes, organs, tissues, and circulating lymph that together perform these core functions.
Lymph Composition And Major Conduits
- Lymph resembles plasma and carries proteins, excess fluid, and pathogens through lymphatic vessels.
- Lymphatic vessels converge into larger structures like the cisterna chyli and larger ducts toward the bloodstream.
Ducts That Dump Lymph Into Blood
- Two main ducts return lymph to blood: the right lymph duct to right subclavian/jugular and the larger thoracic duct to the left veins.
- The thoracic duct drains most of the body and is larger than the right lymph duct.