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C-4 spinal ganglion, aortic arch 6, ascending aorta, cervical plexus, conus cordis, dorsal primary ramus, epaxial myotomic division, esophageal endoderm, hypaxial myotomic division, infrahyoid muscle mass, jugular lymph sac, lateral nasal elevation, lateral ventricle, left atrium, medial nasal elevation, mesocardium (cranial part), nasal capsule condensation, nasal fin, nasal pit, neural canal, paraphysial arch, precardinal vein, pulmonary trunk, right and left truncus swellings, right atrium, striatal part of cerebral vesicle, sulcus limitans, suprastriatal part of cerebral vesicle, third ventricle, tracheal endoderm, undivided truncus arteriosus, vagus nerve (CN X), ventral primary ramus, vertebral artery

A section through the truncus arteriosus of the heart and cerebral vesicle of the telencephalon.

Observe:
1. The dorsal and ventral primary rami of the C-4 spinal ganglion coursing to the epiaxial and hypaxial myotomic divisions, respectively.
2. The right and left truncus swellings dividing the truncus arteriosus into the ascending aorta and pulmonary trunk.
3. The junction of the truncus arteriosus and conus cordis.
4. The medial and lateral nasal elevations on each side of the nasal pit.
5. The two parts of the cerebral vesicle: striatal and suprastriatal.


Keywords: C-4 spinal ganglion, aortic arch 6, ascending aorta, cervical plexus, conus cordis, dorsal primary ramus, epaxial myotomic division, esophageal endoderm, hypaxial myotomic division, infrahyoid muscle mass, jugular lymph sac, lateral nasal elevation, lateral ventricle, left atrium, medial nasal elevation, mesocardium (cranial part), nasal capsule condensation, nasal fin, nasal pit, neural canal, paraphysial arch, precardinal vein, pulmonary trunk, right and left truncus swellings, right atrium, striatal part of cerebral vesicle, sulcus limitans, suprastriatal part of cerebral vesicle, third ventricle, tracheal endoderm, undivided truncus arteriosus, vagus nerve (CN X), ventral primary ramus, vertebral artery

Source: Atlas of Human Embryos.