Lymphatic and Lymphatic and ImmuneImmune

What are lymph nodes?What are lymph nodes?

A mass of lymphatic tissue that helps A mass of lymphatic tissue that helps remove bacteria, tumor cells, etc…remove bacteria, tumor cells, etc…

What is lymph?What is lymph?

The watery fluid in the lymph vessels The watery fluid in the lymph vessels collected from the tissue spaces.collected from the tissue spaces.

List four lymphoid List four lymphoid organs.organs.

spleen thymus gland tonsils Peyer's patches

List four mechanisms that aids lymph return:

milking action of skeletal muscles pressure changes within the thorax

smooth muscle contractions within the lymphatic vessels

presence of valves within the larger lymph vessels

What organ Filters and What organ Filters and cleanses the blood of cleanses the blood of

bacteria, viruses, and other bacteria, viruses, and other debrisdebris

SpleenSpleen

What lymph organ What lymph organ programs T cells and programs T cells and

functions at peak levels only functions at peak levels only during youth is theduring youth is the

ThymusThymus

The body's first line of The body's first line of defense against the defense against the

invasion of disease-causing invasion of disease-causing microorganisms is:microorganisms is:

skin and mucous membranesskin and mucous membranes

The process by which The process by which neutrophils are squeezed neutrophils are squeezed

through the capillary through the capillary walls during the walls during the

inflammatory process is inflammatory process is called:called:

diapedesisdiapedesis