What type of immunity is present at birth and provides general protection against a wide range of pathogens?
Innate Immunity/Nonspecific Resistance
What type of immunity involves the activation of specific lymphocytes to combat particular pathogens?
Adaptive Immunity
What is the main fluid that flows within lymphatic vessels?
Lymph
How does interstitial fluid differ from lymph?
Through the areas they travel. Interstitial fluid travels between tissues, but lymph is inside the lymph vessels and the system. Otherwise they are the same.
What type of tissue contains large numbers of lymphocytes and is a specialized form of reticular tissue?
Lymphatic tissue
Name the two types of lymphocytes involved in adaptive immune responses.
B and T cells
What are lymphatic capillaries, and how do they function in the lymphatic system?
They obtain interstitial fluid by opening up their endothelial-like valves and transport it to the lymph vessels.
Where are lymphatic capillaries not found in the body?
- Avascular tissue
- Parts of the spleen
- Red bone marrow
What is the role of lacteal (lymphatic capillary) in the small intestine?
To transport digested fats from the small intestine into the blood.
What are the main lymphatic trunks in the body?
- jugular
- subclavian
- bronchomediastinal
- intestinal
- lumbr
What is the role of skeletal muscle contractions and respiratory movements play in the movement of lymph?
Skeletal muscle contractions compress lymphatic vessels and force lymph toward the heart, while respiratory movements create pressure changes that aid lymph flow from the abdominal region to the thoracic region.
Where do immune cells become immunocompetent?
In the red bone marrow and thymus.
What are the secondary lymphatic organs and tissues?
- lymph nodes
- spleen
- lymphatic nodules