Search results
Results from the WOW.Com Content Network
When borne by the red, white, and blue. 𝄆 When borne by the red, white, and blue. 𝄇 Thy banners make tyranny tremble, When borne by the red, white and blue. When war wing'd its wide desolation, And threaten'd the land to deform, The ark then of freedom's foundation, Columbia rode safe thro' the storm; With her garlands of vict'ry around her,
Bone marrow is a semi-solid tissue found within the spongy (also known as cancellous) portions of bones. [ 2 ] In birds and mammals, bone marrow is the primary site of new blood cell production (or haematopoiesis). [ 3 ] It is composed of hematopoietic cells, marrow adipose tissue, and supportive stromal cells.
The marginal zone (MZ) separates the red and white pulp regions and contains macrophages, B cells, and dendritic cells. MZ macrophages remove some types of blood-borne bacteria and viruses. [2] MZ B and dendritic cells are involved in antigen processing and presentation to lymphocytes in the white pulp. [2]
The spleen, in healthy adult humans, is approximately 7 to 14 centimetres (3 to in) in length. An easy way to remember the anatomy of the spleen is the 1×3×5×7×9×10×11 rule. The spleen is 1 by 3 by 5 inches (3 by 8 by 13 cm), weighs approximately 7 oz (200 g), and lies between the 9th and 11th ribs on the left-hand side and along the axis ...
The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between the circulatory system and the central nervous system, thus protecting the brain from harmful or unwanted substances in the blood. [ 1 ] The blood–brain barrier is formed by endothelial ...
For spinal cord tissue, see spinal cord. Comprehensive diagram that shows the development of different blood cells from haematopoietic stem cell to mature cells in both myeloid and lymphoid lineages. Myeloid tissue, in the bone marrow sense of the word myeloid (myelo- + -oid), is tissue of bone marrow, of bone marrow cell lineage, or resembling ...
Transverse section of a portion of the spleen. (Lymphatic nodule labeled at center right.) 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.
A lymphocyte is a type of white blood cell (leukocyte) in the immune system of most vertebrates. [1] Lymphocytes include T cells (for cell-mediated and cytotoxic adaptive immunity), B cells (for humoral, antibody-driven adaptive immunity), [2] [3] and innate lymphoid cells (ILCs; "innate T cell-like" cells involved in mucosal immunity and homeostasis), of which natural killer cells are an ...