Cells Found in Red Pulp
Red pulp consists of a dense network of fine reticular fiber, continuous with those of the splenic trabeculae, to which are applied flat, branching cells. The meshes of the reticulum are filled with blood:
- White corpuscles are found to be in larger proportion than they are in ordinary blood.
- Large rounded cells, termed splenic cells, are also seen; these are capable of ameboid movement, and often contain pigment and red-blood corpuscles in their interior.
- The cells of the reticulum each possess a round or oval nucleus, and like the splenic cells, they may contain pigment granules in their cytoplasm; they do not stain deeply with carmine, and in this respect differ from the cells of the Malpighian corpuscles.
- In the young spleen, macrophages may also be found, each containing numerous nuclei or one compound nucleus.
- Nucleated red-blood corpuscles have also been found in the spleen of young animals.
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