Lymphatic System Structure and Function

The video explains the lymphatic system, its role in maintaining blood volume, and its close relationship with the immune system. It covers fluid dynamics in capillaries, the structure and function of lymphatic vessels and nodes, and the roles of lymphoid organs like the spleen and thymus. The video also discusses lymphoid tissues such as tonsils and Peyer's patches.

What percentage of fluid remains behind in the tissues after most of it is reabsorbed into the capillaries?

• 10%

• 15%

• 20%

• 25%

What is the fluid called once it is absorbed into the lymphatic vessels?

• Plasma

• Serum

• Lymph

• Interstitial fluid

Which type of cells patrol the sinuses of lymph nodes to destroy pathogens?

• Eosinophils

• Neutrophils

• Macrophages

• Lymphocytes

Where is the spleen located in the body?

• Lower right part of the abdomen

• Upper left part of the abdomen

• Lower left part of the abdomen

• Upper right part of the abdomen

What are the two structural components of the spleen?

• Follicles and cords

• White pulp and red pulp

• Cortex and medulla

• Trabeculae and sinuses

Which lymphoid organ is more active in newborns than in adults?

• Appendix

• Tonsils

• Thymus

• Spleen

What is the primary function of the tonsils?

• Gather and remove pathogens entering through ingestion or inhalation

• Remove old red blood cells

• Store iron for hemoglobin production

• Activate lymphocytes

Where are Peyer's patches located?

• Esophagus

• Stomach

• Small intestine

• Large intestine

What is the role of the appendix in the lymphatic system?

• Store blood components

• Destroy bacteria

• Produce lymphocytes

• Filter lymph

What is the main function of the lymphatic system in relation to blood volume?

• Increase blood pressure

• Regulate blood pH

• Maintain blood volume

• Decrease blood viscosity