title: The ontogenesis of mast cells.
mesh_terms: D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D001773:Blood Cells / Q000166:cytology; D003239:Connective Tissue Cells; D008099:Liver / Q000166:cytology / Q000196:embryology; D008198:Lymph Nodes / Q000166:cytology; D008407:Mast Cells; D051381:Rats; D011919:Rats, Inbred Strains; D013154:Spleen / Q000166:cytology / Q000196:embryology; D013950:Thymus Gland / Q000166:cytology / Q000196:embryology