Mouse: day 13

On this page stained cross sections of 13-days old embryos of the mouse (Mus musculus) are shown.
 

Embryology of the mouse - cross sections day 13
Recommendation to study these views together with the textbook: Atlas of descriptive embryology. Gary C. Schoenwolf. Pearson, Benjamin Cummings eds. ISBN 978-0-13-158560-7
Section at the level of the brain
1 = Diencephalon 2 = Lateral ventricles telecephalon 3 = Metencephalon 4 = Protrusion IV brain ventricle
Section at the level of the brain (eye bud and possibly also ear formation)
1 = Spine 2 = Beginning optic nerve 3 = Retina 4 = Lens 5 = Cornea 6 = Eye bud 7 = Telencephalon 8 = Eustachius tube (?) 9 = Semicircular channels
Section at the level of the heart
1 = Spine 2 = Centrum 3 = Pharynx 4 = Anterior cardinale vein 5 = Sinus venosus 6 = Trachea 7 = Left atrium 8 = Pericardial cavity 9 = Left ventricle 10 = Right ventricle 11 = Anterior extremity 12 = Right atrium 13 = Bone formation of ribs 14 = Bulbus arteriosus 15 = Sympathic ganglion 16 = Spinal ganglion 17 = Tail end
Section at the level of the developing lungs and heart
1 = Spine 2 = Posterior cardinal vein 3 = Dorsal aorta 4 = Pleural cavity 5 = Diaphragm 6 = Posterior vena cava 7 = Peritoneal cavity 8 = Liver 9 = Portal vein in liver 10 = Lung 11 = Oesophagus 12 = Centrum 13 = Spinal ganglion 14 = Section through guts 15 = Tail 16 = Part of extremity
Section at the level of the developing guts
1 = Spine 2 = Regio mesonephros 3 = Regio of formation of the gonades 4 = Region of the pancreas 5 = Peritoneal cavity 6 = Extremity 7nbsp;= Sections though the guts 8 = Tail
Source: emouseatlas.org