Chapter 16 Lymphatic System
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Chapter 16 Lymphatic System
Lymphatic system icc davis anatomy physiology chapter 16
Chapter 16 Lymphatic System ICC:Davis
Transports excess fluid from interstitial space to the blood stream, helps defend the body from invasion, and absorbs digested fats through lacteals in the small intestine.
Microscopic closed-ended tubes in the interstitial space.
Tissue fluid entering lymphatic capillaries is called ____.
Lymphatic capillaries in the small intestine.
Formed by the merging of lymphatic capillaries.
Lymphatic vessels lead to ____ and merge into ____.
Lead to lymph nodes
afferent lymphatic vessel
Lead away from lymph nodes
efferent lymphatic vessel
Drain lymph from large body regions and lead to 2 collecting ducts.
Drains the right side of the head, chest and arm.
Right lymphatic duct
Largest duct, drains the rest of the body excluding the right side of the head, chest and arm.
The right lymphatic duct and the thoracic duct both empty into ____
What is the order of the lymphatic pathway?
right lymphatic duct/thoracic duct
Originates from the blood plasma due to blood pressure
Plasma proteins left in the blood causes ____ to build, drawing water back into the capillary walls.
Absorbs fat and returns very small proteins to the blood.
Transports foreign particles to lymph nodes
Disease which the lymphatic vessels are blocked by parasitic worms. The blockage will not allow the lymph to circulate properly, causing severe edema, primarily in the extremities.
Where are lymph nodes found?
cervical (neck), axillary (armpits), inguinal regions (groin) and thoracic (chest), abdominal (stomach), and pelvic cavities.
Occur in chains along major lymphatic vessels and contain structural units called lymph nodules. Not found in the central nervous system.
The structural units found in lymph nodes
Filter harmful particles before returning to blood, centers for lymphocyte production, and contain macrophages that remove foreign particles from lymph.
Functioning mostly from birth to puberty, this organ is a soft, bi-lobed structure located between the lungs and above the heart.
Divides into lobules that contain lymphocytes, which change into T-lymphocytes (T cells) for immunity
The largest lymphatic organ
Located on the left side beneath the diaphragm and behind the stomach
Functions as a blood reservoir; macrophages and lymphocytes filter foreign particles and damaged RBC from blood
What causes infections?
pathogens which include viruses, bacteria, protozoans, and parasites
Defense mechanism which protects against many pathogens
nonspecific defense mechanisms
Defense mechanism which provides protection against a specific pathogen which is "immunity"
specific defense mechanisms
Each species is resistant to certain diseases while susceptible to others.
Prevent entrance to body; skin and mucous membranes
Pepsin and HCI in gastric juice, and lysozyme in tears, are examples of what type of chemical barrier?
Proteins produced by cells that interfere with the reproduction and spread of viruses is what type of chemical barrier?
Only effective when you have a very low pH and hydrocloric acid is present.
Chemical barrier which causes the liver and spleen to retain iron which is needed by bacteria and fungi to grow.
Chemical barrier where tissues response to injury. Causes redness, swelling, heat, and pain.
Chemical barrier which removes foreign particles from lymph, the most active being neutrophils and monocytes.
Uses lymphocytes and macrophages to resist specific pathogens
Where are undifferentiated lymphocytes produced?
Lymphocytes enter the blood and some are processed by the thymus gland to become what?
T-lymphocytes (T cells)
Lymphocytes remaining in red bone marrow to become what?
Attack directly and provide cell-mediated immunity.
Attack indirectly by producing antibodies and provide antibody-mediated immunity.
What are the types of specific defense mechanisms?
origin of cells (T-cells/B-cells)
Types of acquired immunity
Acquired immunity which a person learns through having a disease to make antibodies, such as chickenpox.
Acquired immunity which a person is exposed to a vaccine containing dead or weakened pathogens and learns to make antibodies.
Acquired immunity where babies receive antibodies from mother before birth and through milk after birth.
Acquired immunity where a person is given antibodies in an injection.
What are the types of nonspecific defense mechanisms?