Blood for serologic screening of infants or small children is often gathered by finger/heel stick. Capillary tubes could be used for infants. Capillary tubes need the submitter to acquire access to a hematocrit centrifuge. Ileum mucosa. Trichrome stain disclosed the key histological locating of collagen during the subepithelial region (400x) https://rudyr011zvs8.wikissl.com/user