Migration of mast cells through the area postrema.
D000367:Age Factors; D000818:Animals; D001808:Blood Vessels / Q000166:cytology; D002415:Cats; D002467:Cell Nucleus; D003594:Cytoplasmic Granules; D004285:Dogs; D000882:Haplorhini; D008251:Macaca; D008407:Mast Cells / Q000166:cytology / Q000502:physiology*; D008526:Medulla Oblongata / Q000098:blood supply / Q000166:cytology*; D009457:Neuroglia / Q000166:cytology; D009474:Neurons / Q000166:cytology; D002679:Pan troglodytes; D051381:Rats