![. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 100 AMPHIBIA. simple structure of these pulmonary sacs, it will readily be seen that the function of respiration could be only very ineffectively aided by the latter organs, even were ... . The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 100 AMPHIBIA. simple structure of these pulmonary sacs, it will readily be seen that the function of respiration could be only very ineffectively aided by the latter organs, even were ...](https://c1.alamy.com/thumbs/pfmpy4/the-cyclopdia-of-anatomy-and-physiology-anatomy-physiology-zoology-100-amphibia-simple-structure-of-these-pulmonary-sacs-it-will-readily-be-seen-that-the-function-of-respiration-could-be-only-very-ineffectively-aided-by-the-latter-organs-even-were-there-no-other-diffi-culty-arising-from-the-imperfect-structure-of-the-apparatus-which-in-the-air-breathing-amphibia-serves-the-office-of-conveying-the-air-into-the-lungs-a-short-description-of-the-means-by-which-the-act-of-inspiration-is-effected-in-the-frog-will-enable-us-to-judge-how-far-it-may-be-possible-that-the-rudimentary-lungs-in-pfmpy4.jpg)
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 100 AMPHIBIA. simple structure of these pulmonary sacs, it will readily be seen that the function of respiration could be only very ineffectively aided by the latter organs, even were ...
![Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett - Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett -](https://obgyn.onlinelibrary.wiley.com/cms/asset/2e6d98fe-40c9-4e06-a606-9571cc8e6476/mfig002.jpg)
Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett -
![Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett - Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett -](https://obgyn.onlinelibrary.wiley.com/cms/asset/32b28ed4-5541-4a75-919e-f8b3dadf17e3/mfig003.jpg)
Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett -
![Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett - Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett -](https://obgyn.onlinelibrary.wiley.com/cms/asset/0e40f25e-8ec5-4ab0-8e49-d02b67d4a821/mfig001.jpg)
Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett -
![A very large yolk sac (Y) (mean diameter, 8.1 mm) and a living embryo... | Download Scientific Diagram A very large yolk sac (Y) (mean diameter, 8.1 mm) and a living embryo... | Download Scientific Diagram](https://www.researchgate.net/profile/San-Nung-Chen/publication/7446477/figure/fig3/AS:277742101778451@1443230285857/A-very-large-yolk-sac-Y-mean-diameter-81-mm-and-a-living-embryo-E-crown-rump_Q640.jpg)