Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site psivax.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!vax135!cornell!uw-beaver!tektronix!hplabs!sdcrdcf!psivax!friesen From: friesen@psivax.UUCP (Stanley Friesen) Newsgroups: net.bio Subject: Re: Embryology Message-ID: <735@psivax.UUCP> Date: Tue, 17-Sep-85 11:15:32 EDT Article-I.D.: psivax.735 Posted: Tue Sep 17 11:15:32 1985 Date-Received: Mon, 23-Sep-85 00:23:18 EDT References: <287@bcsaic.UUCP> Reply-To: friesen@psivax.UUCP (Stanley Friesen) Organization: Pacesetter Systems Inc., Sylmar, CA Lines: 15 Summary: In article <287@bcsaic.UUCP> michaelm@bcsaic.UUCP (michael b maxwell) writes: >In the gastrula, do the ectoderm, mesoderm and endoderm actually look >and/or stain differently? Or are they just presumptively different? In what organism? The answer varies quite a bit depending on which animal you are talking about. In Humans I believe they look quite different. Endoderm is composed of a layer of smallish angular cells, ectoderm is a layer of larger, less angular cells, and mesoderm is originally an irregular network of more or less amoeboid cells. -- Sarima (Stanley Friesen) UUCP: {ttidca|ihnp4|sdcrdcf|quad1|nrcvax|bellcore|logico}!psivax!friesen ARPA: ttidca!psivax!friesen@rand-unix.arpa Brought to you by Super Global Mega Corp .com