Lymphatic system and disease resistance

Question 2

Lymphatic system and disease resistance: Components

Answer 2

• Lymphatic vessels
• Spleen and Lymph node
• Lymphocytes

Question 3

Lymphatic system and disease resistance: Function

Answer 3

• The lymphatic system, along with veins, is responsible for draining fluid from body tissues
• In concert with blood cells, it provides the mechanisms for defense against disease and promotes repair of damaged tissues

Question 4

Lymphatic vessels: Components

Answer 4

• Right lymphatic duct
• Thoracic (left lymphatic) duct
• Cisterma chyli
• Interstitial fluid
• Venule
• Blood capillary
• Lymphatic capillary
• Arteriole
• Blood
• Lymph
• Tissue cell

Question 5

Lymphatic vessels: Functions

Answer 5

1. Drains excess interstitial fluid (called lymph once it passes into the vessels) from tissues
2. Transports lipids and lipid-soluble vitamins from the gastrointestinal tract to the blood

Question 6

Spleen and lymph node: Components

Answer 6

• Afferent lymphatic vessels
• Lymph node
• Efferent lymphatic vessels
• White pulp
• Red pulp
• Splenic artery
• Splenic vein
• Spleen
• Lymphocytes
• Macrophages

Question 7

Spleen and lymph node: Functions

Answer 7

1. Macrophages phagocytize foreign cells and substances trapped in the lymph node and spleen
2. Spleen stores blood platelets
3. Spleen produces blood cells during fetal life

Question 8

Lymphocytes: Process in activated T cells

Answer 8

• Perforin
• Cytolysis

Question 9

Lymphocytes: Process in activated B cells

Answer 9

Proliferation
- Plasma cells
- Antibodies

Question 10

Lymphocytes: Functions

Answer 10

1. T lymphocytes directly destroy invading cells by breaking down their membranes (cytolysis)
2. B lymphocytes destroy foreign cells and substances by producing antibodies