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The liver parenchyma is the functional tissue of the organ made up of around 80% of the liver volume as hepatocytes. The other main type of liver cells are non-parenchymal. Non-parenchymal cells constitute 40% of the total number of liver cells but only 6.5% of its volume. [11]
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Stromal cells can become connective tissue cells of any organ, for example in the uterine mucosa (endometrium), prostate, bone marrow, lymph node and the ovary. They are cells that support the function of the parenchymal cells of that organ. The most common stromal cells include fibroblasts and pericytes.
The cells which make up stroma tissues serve as a matrix in which the other cells are embedded. [2] Stroma is made of various types of stromal cells. Examples of stroma include: stroma of iris; stroma of cornea; stroma of ovary; stroma of thyroid gland; stroma of thymus; stroma of bone marrow; lymph node stromal cell; multipotent stromal cell ...
This means immune cells may leave the lymph node along a chemokine gradient. [6] Most T cells are, in time, eliminated in the thymus by a process of clonal deletion. However, some of them escape this process and are then "mopped up" in the lymph nodes. Lymph node stromal cells express peripheral tissue-restricted antigens (PTAs) on their surface.
These cells, along with the epidermal guard cells of the stoma, form a system of air spaces and chambers that regulate the exchange of gases. In some works, the cells of the leaf epidermis are regarded as specialised parenchymal cells, [4] but the modern preference has long been to classify the epidermis as plant dermal tissue, and parenchyma ...
The hepatocyte plates are one cell thick in mammals and two cells thick in the chicken. Sinusoids display a discontinuous, fenestrated endothelial cell lining. The endothelial cells have no basement membrane and are separated from the hepatocytes by the space of Disse, which drains lymph into the portal tract lymphatics. [citation needed]
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