The blood system is supported by hematopoietic stem and progenitor cells (HSPCs) found in a specialized microenvironment called the niche. Many different niche cell types support HSPCs. however how they interact and their ultrastructure has been difficult to define. Here. https://www.ealisboa.com/mega-save-SlimJim-Recycling-Station-3x87-ltr-m-sort-blat-gront-lag-best-save/