4.1 Anatomy of Lymphatic System

lymphatic system

carries excess interstitial fluid from tissues back to cardiovascular circulation and provides locations for immune cells to monitor the body

lymph, lymph vessels, lymphoid tissues, and lymphoid organs

what is the lymphatic system composed of

lymph

excess fluid that is not returned via venules

absorbs fat and transports to blood and immune defense

what is the function of the lymphatic system

1. lymphatic capillary

2. subclavian veins

3. venous circulation

4. heart

what is the pathway of lymph

lymphatic capillaries

take up plasma fluid and excess fluidl

lymphatic vessels

contain one-way valves and return lymph depends on the contraction of these

lymphatic trunk

lymphatic vessels combine and drain from major areas of the body

lymphatic ducts

where lymphatic trunks empty into and return to venous system

lymph nodes

the filtering system that rids lymph of infectious organisms and other debris as it passes a series of sinuses

spleen

extract old or defective blood cells and platelets and removes debris, foreign matter, bacteria, viruses, and toxins

thymus gland

secrete thymosin and thymopoietin

thymosin/thymopoietin

hormones that enable T cells to mature and function

T cells

a lymphocyte that attacks body cells that are cancerous or infected with a pathogen

prominent in newborns, grows during childhood, and becomes fibrous-fatty tissue by old age

how does the size of the thymus gland fluctuate

tonsils

gather and destroy bacteria inhaled and bacteria gets destroyed in the lymphoid tissues

appendix

contribute to immune function by storing beneficial gut bacteria and generating lymphocytes

red bone marrow

location of where T and B cells develop

thymus

T cells mature in _______

red bone marrow

B cells mature in _______

peyer’s patches

clusters of mucosa associated lymphoid tissue (MALT); contains WBC to assist in pathogen identification and destruction in the digestive sys

low

do lymphatic capillaries have high or low hydrostatic pressure