The following is a list of the "A" codes for MeSH

Mesh

Mesh consists of semi-permeable barrier made of connected strands of metal, fiber, or other flexible/ductile material. Mesh is similar to web or net in that it has many attached or woven strands.-Types of mesh:...

. It is a product of the United States National Library of Medicine

United States National Library of Medicine

The United States National Library of Medicine , operated by the United States federal government, is the world's largest medical library. Located in Bethesda, Maryland, the NLM is a division of the National Institutes of Health...

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Source for content is here http://www.nlm.nih.gov/mesh/filelist.html. (File "2006 MeSH Trees".)

--- blood cells

--- blood platelets --- erythrocytes --- erythrocyte membrane --- erythrocytes, abnormal --- acanthocytes --- erythrocyte inclusions --- heinz bodies --- megaloblasts --- spherocytes --- reticulocytes --- hemocytes --- leukocytes --- granulocytes --- basophils --- eosinophils --- neutrophils --- leukocytes, mononuclear --- lymphocytes --- killer cells --- killer cells, natural --- killer cells, lymphokine-activated --- lymphocyte subsets --- b-lymphocyte subsets --- t-lymphocyte subsets --- b-lymphocytes --- b-lymphocyte subsets --- plasma cells --- t-lymphocytes --- cd4-positive t-lymphocytes --- t-lymphocytes, helper-inducer --- th1 cells --- th2 cells --- cd8-positive t-lymphocytes --- t-lymphocytes, cytotoxic --- t-lymphocyte subsets --- lymphocytes, null --- lymphocytes, tumor-infiltrating --- monocytes --- monocytes, activated killer

--- bone marrow cells

--- granulocytes --- granulocyte precursor cells --- hematopoietic stem cells --- myeloid progenitor cells --- erythroid progenitor cells --- erythroblasts --- megaloblasts --- megakaryocytes --- reticulocytes --- granulocyte precursor cells --- monocytes

--- antibody-producing cells

--- b-lymphocytes --- b-lymphocyte subsets --- plasma cells

--- antigen-presenting cells

--- dendritic cells --- langerhans cells --- dendritic cells, follicular

--- leukocytes

--- granulocytes --- basophils --- eosinophils --- neutrophils --- leukocytes, mononuclear --- lymphocytes --- killer cells --- killer cells, natural --- killer cells, lymphokine-activated --- lymphocyte subsets --- b-lymphocyte subsets --- t-lymphocyte subsets --- b-lymphocytes --- b-lymphocyte subsets --- plasma cells --- t-lymphocytes --- cd4-positive t-lymphocytes --- t-lymphocytes, helper-inducer --- th1 cells --- th2 cells --- t-lymphocytes, regulatory --- cd8-positive t-lymphocytes --- t-lymphocytes, cytotoxic --- jurkat cells

Jurkat cells

Jurkat cells are an immortalized line of T lymphocyte cells that are used to study acute T cell leukemia, T cell signaling, and the expression of various chemokine receptors susceptible to viral entry, particularly HIV. Jurkat cells are also useful in science because of their ability to produce...

 --- t-lymphocyte subsets --- lymphocytes, null --- lymphocytes, tumor-infiltrating --- monocytes --- monocytes, activated killer

--- lymphatic system

Lymphatic system

The lymphoid system is the part of the immune system comprising a network of conduits called lymphatic vessels that carry a clear fluid called lymph unidirectionally toward the heart. Lymphoid tissue is found in many organs, particularly the lymph nodes, and in the lymphoid follicles associated...

--- lymphatic vessels --- endothelium, lymphatic --- thoracic duct

Thoracic duct

In human anatomy, the thoracic duct of the lymphatic system is the largest lymphatic vessel in the body. It is also known as the left lymphatic duct, alimentary duct, chyliferous duct, and Van Hoorne's canal....

 --- lymphoid tissue --- adenoids --- bursa of fabricius

Bursa of Fabricius

In birds, the bursa of Fabricius is the site of hematopoiesis, a specialized organ that, as first demonstrated by Bruce Glick and later by Max Cooper and Robert Good, is necessary for B cell development in birds...

 --- germinal center

Germinal center

Germinal centers are sites within lymph nodes where mature B lymphocytes rapidly proliferate, differentiate, mutate their antibodies , and class switch their antibodies during a normal immune response to an infection...

 --- dendritic cells, follicular --- lymph nodes --- germinal center

Germinal center

Germinal centers are sites within lymph nodes where mature B lymphocytes rapidly proliferate, differentiate, mutate their antibodies , and class switch their antibodies during a normal immune response to an infection...

 --- dendritic cells, follicular --- peyer's patches --- spleen

Spleen

The spleen is an organ found in virtually all vertebrate animals with important roles in regard to red blood cells and the immune system. In humans, it is located in the left upper quadrant of the abdomen. It removes old red blood cells and holds a reserve of blood in case of hemorrhagic shock...

 --- thymus gland --- tonsil

Tonsil

Palatine tonsils, occasionally called the faucial tonsils, are the tonsils that can be seen on the left and right sides at the back of the throat....

--- phagocytes

--- macrophages --- epithelioid cells --- foam cells

Foam cells

Foam cells are cells in an atheroma derived from both macrophages and smooth muscle. In chronic hyperlipidemia, lipoproteins aggregate within the intima of blood vessels and become oxidized by the action of oxygen free radicals generated either by macrophages or endothelial cells...

 --- giant cells, foreign-body --- giant cells, langhans --- histiocytes --- kupffer cells --- macrophages, alveolar --- macrophages, peritoneal --- monocytes --- monocytes, activated killer --- neutrophils

--- reticuloendothelial system

Reticuloendothelial system

"Reticuloendothelial system" is an older term for the mononuclear phagocyte system. The mononuclear phagocyte system consists primarily of monocytes and macrophages. The spleen is the largest unit of the mononuclear phagocyte system. The monocyte is formed in the bone marrow and transported by the...

--- macrophages --- epithelioid cells --- foam cells

Foam cells

Foam cells are cells in an atheroma derived from both macrophages and smooth muscle. In chronic hyperlipidemia, lipoproteins aggregate within the intima of blood vessels and become oxidized by the action of oxygen free radicals generated either by macrophages or endothelial cells...

 --- giant cells, foreign-body --- giant cells, langhans --- histiocytes --- kupffer cells --- macrophages, alveolar --- macrophages, peritoneal --- monocytes --- monocytes, activated killer