#1
Waht is the clear fluid that has escaped from the blood vessels?
Lymph
What are the main structures of the lymphatic system?
Lymphatic vessels collect lymph from the loose C.T. around _______________.
lymphatic vessels carry fluid to __________ in the neck then back to the heart
Blood Capillaries
Great Veins
True or False: Through lymphatic vessels, fluid only flows away from the heart.
False: Flows only toward the heart
Lymph capillaries receive tissue fluid from C.T. and are __________.
Extremely Permeable
What are specialized lymphatic capillaries located in the villi of the small intestines that receive digested fats (fatty lymph) called chyle?
Lacteals
What is the function of the immune system?
To contain and destroy diseased organisms.
From the lymph capillaries, lymph enters ____________________, which accompany blood vessels (deep and superficial).
Lymph Collecting Vessels
What are the bean-shaped organs located along lymphatic collecting vessels that cleanse the lymph of pathogens?
Lymph Nodes
What are the main components of the immune system?
Lymphocytes, lymphoid tissue, and lymphoid organs (spleen, thymus, lymph nodes, tonsils, and appendix)
The human body contains approximately ___________ lymph nodes.
What is the flow of lymph?
Afferent lymphatic vessels, lymph sinuses, efferent lymphatic vessels
What are the functions of lymphatic vessels?
-Provide a means by which disease organisms and diseased cells
travel throughout the body
-Which transport fluid and proteins that has escaped from capillaries back to the heart
-Carries absorbed fat from the intestine to blood
What consumes pathogens and foreign particles in the lymph?
Macrophages
Lymph duct that ascends along vertebral bodies and empties into venous circulation at the junction of left internal jugular and left subclavian veins; drains three quarters of the body
Thoracic Duct
What empties into right internal and subclavian veins?
Right lymphatic duct
_______ is located near blood capillaries; closed-end vessels whose walls consist of single layer of endothelial cells
Lymph Capillaries
The lymph sinuses are spanned by a network of ______________ covered by endothelial cells, which house many macrophages that consume pathogens and foreign particles in the lymph
Reticular Fibers
Lymph nodes _________________ in their roles as lymphoid organs of the immune system.
Fight Disease
Lymphoid tissue is found in all lymphoid organs except where?
Lymphoid tissue is a ______________ that houses T and B lymphocytes
The thymus
Network of reticular fibers
What does MALT stand for?
What is a special type of C.T. in which vast quantities of lymphocytes gather to fight microorganisms
Mucosa-Associated Lymphoid Tissue
Lymphoid Tissue
True or False:
Thoracic Ducts are found in all people?
The right lymphatic duct is found in 50% of people?
True
False only 20% of people
What is the order of lymphatic vessels and each vessels function?
- Lymph capillaries: smallest; first
receive lymph
- Lymphatic collecting vessels: collect lymph from capillaries; have valves
- Lymph nodes: scattered along
collecting vessels
- Lymph trunks: collect lymph from
collecting vessels
- Lymph ducts: empty into veins of the
neck
The four groups of tonsils are?
Palatine, lingual, pharyngeal, and tubal
The spleen is the _____________________ in the fetus and stores platelets throughout life
Site of hematopoiesis.