Globin switches in yolk sac-like primitive and fetal-like definitive red blood cells produced from human embryonic stem cells Development of cystic embryoid bodies with visceral yolk-sac-like structures from mouse embryonic stem cells using low-adherence 96-... Sac-like pouches in Blastocystis from the house lizard Cosymbotus platyurus. Occurrence of Embryo Sac-like Structures in the Microsporangia of Leptomeria billardierii R.Br. [Operative treatment of bleeding, sac-like aneurysms of the brain base.] METHOD OF TREATING WOUND IN SAC-LIKE CAVITY PRESENT INSIDE OF SUBJECT Clinical and Pathological Findings of a Sac-like Formation in the Tunica Vaginalis of a Nelore (Bos indicus) Bull Venous saclike aneurysm of the central nervous system. Experimental studies on the formation of the embryosac-like giant pollen grain in the anther of Hyacinthus orientalis A case of lacrimal gland cyst presenting lacrimal sac-like glandular tissue