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Spleen produces all types of blood cells during fetal life; Production of opsonins, properdin, and tuftsin. Release of neutrophils following myocardial infarction. [19] Creation of red blood cells. While the bone marrow is the primary site of hematopoiesis in the adult, the spleen has important hematopoietic functions up until the fifth month ...
Splenocytes are white blood cells that reside in the spleen and are involved in functions of the spleen, such as filtering blood and the immune response. [1] Splenocytes consist of a variety of cell populations such as T and B lymphocytes, dendritic cells and macrophages, which have different immune functions. [2]
The red pulp of the spleen is composed of connective tissue known also as the cords of Billroth and many splenic sinusoids that are engorged with blood, giving it a red color. [1] [2] Its primary function is to filter the blood of antigens, microorganisms, and defective or worn-out red blood cells. [3]
The spleen also is responsible for recycling some erythrocytes components and discarding others. For example, hemoglobin is broken down into amino acids that are reused. Research on bony fish has shown that a high concentration of T cells are found in the white pulp of the spleen. [14] Like the thymus, the spleen has only efferent lymphatic ...
The cells are primarily monocytes and macrophages, and they accumulate in lymph nodes and the spleen. The Kupffer cells of the liver and tissue histiocytes are also part of the MPS. The mononuclear phagocyte system and the monocyte macrophage system refer to two different entities, often mistakenly understood as one. [citation needed]
The spleen is the largest lymphoid organ in the body but has other functions. [23] It breaks down both red and white blood cells that are spent. This is why it is sometimes known as the 'graveyard of red blood cells'. [23] A product of this digestion is the pigment bilirubin, which is sent to the liver and secreted in the bile.
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White pulp is a histological designation for regions of the spleen (named because it appears whiter than the surrounding red pulp on cross section), that encompasses approximately 25% of splenic tissue. White pulp consists entirely of lymphoid tissue. Specifically, the white pulp encompasses several areas with distinct functions: