File:Odgers1938 fig04.jpg

Plate I Fig 4

Abbreviations

• R.B.R. right bulbar ridge.
• L.B.R. left bulbar ridge.
• R.S.T. right superior tubercle of the A.-V. cushions.
• R.I.T. right inferior tubercle of the A.-V. cushions.
• I.V.S. interventricular septum.
• A.V.C. auriculoventricular cushions.
• B.A.C. bulbo-auricular channel.

Figs. 3-5. Sections through this region of the heart in a 12-5 mm. embryo ( x 80).

Fig. 3 shows the interventricular septum, I. V.S., capped by cushion tissue (X), which is in contact with the right bulbar ridge, R.B.R.

In Fig. 4, which is the next section below Fig. 3, this tissue X is connected with both the right bulbar ridge, R.B.R., and with the A.-V. cushions, A.V.0.

Fig. 5 is a section three below the last and shows the proliferating tissue joining the A.-V. cushions, A.V.0. The junction between the two is marked on either side by a notch. The bulbo-auricular channel, B.A.C., appears in Fig. 3 as a. narrow cleft between the right bulbar ridge, R.B.R., and the A.-V. cushions, A. V.0.: in Fig. 4 this channel is better marked, while in Fig. 5 it is seen to be continuous with the right auricle.

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Reference

Odgers PN. The development of the pars membranacea septi in the human heart. (1938) J Anat. 72(2): 247-59. https://www.ncbi.nlm.nih.gov/pubmed/17104688 PMID 17104688]

Cite this page: Hill, M.A. (2024, April 24) Embryology Odgers1938 fig04.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Odgers1938_fig04.jpg

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