Image:Gray1182.png

[edit] Summary

This is a plate from Gray's Anatomy. Unless stated otherwise, it is from the online edition of the 20th U.S. edition of Gray's Anatomy of the Human Body, originally published in 1918. Caption: {{{1}}} This image in the public domain because its copyright has expired. This applies worldwide.

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	This image is in the public domain in the United States. In most cases, this means that it was published in the United States prior to January 1, 1923 or that its first publication anywhere in the world was prior to January 1, 1909 or that its copyright expired in the United States.
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[edit] Description

Vertical sections of the heads of early embryos of the rabbit. Magnified. (From Mihalkovics.)

• A. From an embryo 5 mm. long.
• B. From an embryo 6 mm. long.
• C. Vertical section of the anterior end of the notochord and hypophysis, etc., from an embryo 16 mm. long. In A the buccopharyngeal membrane is still present. In B it is in the process of disappearing, and the stomodeum now communicates with the primitive pharynx.

• am. Amnion.
• c. Fore-brain.
• ch. Notochord.
• f. Anterior extremity of fore-gut,
• i. h. Heart.
• if. Infundibulum.
• m. Wall of brain cavity.
• mc. Mid-brain.
• mo. Hind-brain.
• p. Original position of hypophyseal diverticulum, py.
• ph. Pharynx.
• sp.e. Sphenoethmoidal.
• bc. Central.
• sp.o. Sphenoöccipital parts of basis cranii.
• tha. Thalamus.