G6L Image Features

Gastrointestinal Development

Gastrointestinal Tract Development

• Rathke's pouch. Floor of pharynx with foramen caecum (remains of thyroglossal duct), and caudally to it, the hypopharyngeal eminence.
• Aortic sac ventral to H-P eminence.
• Caudal pharynx (extending laterally, ventral to dorsal aorta - cf B4). L lungbud caudal to L atrium with attachment of pulmonary mesenchyme to septum transversum.
• Stomach, mesentery.
• Liver. Gall bladder.
• Cranial limb of midgut loop in mesentery with intervitelline anastomoses.
• Caudal attachment of mesentery with hindgut inside.
• Communication of intra- and extra-embryonic coeloms.

Cardiovascular System

Cardiovascular System Development

Musculoskeletal System

Musculoskeletal System Development

• Cervical region (neural tube cut very obliquely): note the wavy notochord and thin roof and floor plates.
• Thoracic region: alternating light and dark parts of the sclerotomes (vertebral bodies and I.V. Discs, respectively).
• Lumbar region: tiny, dorsal segmental branches of dorsal aorta. Each little branch is aligned almost parallel to the cranial border of the next caudal dorsal root ganglion (segmented dark masses).
• Sacral region: oblique section of neural tube, notochord.

Renal System

Renal System Development

About Stage 13 Embryo Sections - This image is from a serial section of a 6mm CRL pig embryo with some features of the Stage 14 embryo. This embryo is approximately equal to the day 42 human embryo. Use these serial images to identify internal features and relationships that exist within the embryo at this stage. Then compare these images with the later features of the Carnegie stage 22 human embryo.

Links: Carnegie stage 13 - serial sections | Carnegie stage 13 | Embryo Serial Sections

Stage 13 Serial unlabeled images A1   A2   A3   A4   A5   A6   A7 B1   B2   B3   B4   B5   B6   B7 C1   C2   C3   C4   C5   C6   C7 D1   D2   D3   D4   D5   D6   D7 E1   E2   E3   E4   E5   E6   E7 F1   F2   F3   F4   F5   F6   F7 G1   G2   G3   G4   G5   G6   G7

Embryo Stage 13 Serial labeled images A1L  A2L  A3L  A4L  A5L  A6L  A7L B1L  B2L  B3L  B4L  B5L  B6L  B7L C1L  C2L  C3L  C4L  C5L  C6L  C7L D1L  D2L  D3L  D4L  D5L  D6L  D7L E1L  E2L  E3L  E4L  E5L  E6L  E7L F1L  F2L  F3L  F4L  F5L  F6L  F7L G1L  G2L  G3L  G4L  G5L  G6L  G7L

Cite this page: Hill, M.A. (2024, April 24) Embryology Stage 13 image 097.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage_13_image_097.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G