lymphatic organs and tissues

what are the lymph nodes of the lymphatic system?

Cervical lymph nodes, axillary lymph nodes, Lumbar lymph nodes, Pelvic lymph nodes, inguinal Lymph nodes

what are the lymphoid tissues and organs?

Tonsils, thymus, spleen, MALT, Appendix, red blood marrow

what is MALT?

mucosa - Associated lymphatic, tissues and digestive, respiratory, urinary, and Reproductive tracts

what are the primary lymphoid tissues and organs?

Red Bone marrow and thymus, sites of formation and maturing

what are the secondary lymphoid tissue and organ sites?

Tonsils, MALT, Lymph nodes, spleen, sites of activation

tonsils

Large lymphoid nodule in the wall of pharynx, trapping and destroying germs

pharyngeal tonsil

And the posterior wall of the nasopharynx, immune system filter in the upper respiratory track to trap pathogens

Palantine tonsils

at the posterior inferior margin of oral Cavity, trapping and sampling pathogens that enter through mouth and nose

lingual tonsils

Deep to the epithelium, covering the base of the tongue, trapping and destroying pathogens that enter through mouth

What are the lymphoid nodules?

pharyngeal tonsils, palate, Palitine tonsils, lingual tonsils

lymphoid organs

separated from the surrounding tissues by a connective tissue capsule Including lymph nodes, thymus and spleen

what are the functions of the lymph nodes?

Filters lymph, Removes 99% of antigens, phagocytes engulf debris, catch abnormal cells

what do lymphoid tissues and lymph nodes monitor?

Peripheral infections and activate the immune response before they reach vital organs

what are the largest lymph nodes?

Groin, axialle, and at the base of the neck

what lymph nodes protect against pathogens and digestive and respiratory systems?

gut, trachea, lungs, and thoracic duct

why do activated lymph nodes enlarge?

Because of cell division of lymphocytes and phagocytes

thymus phisiology

Pink, grainy, lymphoid organ located and mediastinum above the heart

what is the anatomy of the septa

Fibers partitions that originate at the capsule and divide the lobes into two Into smaller lobes

what happens to the thymus after puberty?

Outer fuse, causing a divide into two lobes

Outer cortex of thymic lobe

Contains densely packed lymphocytes, surrounded by epithelial reticular tissues

Inter medulla of Thymic lobes

Contains epithelial, rectangular cells and concentric layers called thymic (Hassalls) corpuscles

function of thymic (Hassalls) corpuscles

immune regulation, and cell clearance

functions of thymus

Regulates T cell development And maturation, hormone production Like thymosin

what is the function of epithelial reticular cells?

Maintain the blood barrier in cortex to separate developing T cells from general circulation

thymosin

An extract from thymus containing several hormones that promotes the development and maturation of T Cells

anatomy of the spleen

Large lymphoid organ lateral to the stomach

functions of the spleen

Filters, blood, stores iron from red blood cells, immune response to antigens in blood By macrophages, B cells, T cells

Lymphocytopoiesis

lymphocyte production involves the red Bone marrow, thymus and peripheral lymphoid tissues

function of hemocytoblast

In the bone marrow divides lymphoid stem cells which produce all lymphocytes