Cardiovascular System - Carnegie Stage 22

Introduction

The individual serial slices have also been incorporated into a 3D model of this embryo.

The cardiovascular system extends throughout the entire embryo.

Historic Embryology - Cardiovascular
1902 Vena cava inferior \| 1905 Brain Blood Vessels \| 1909 Cervical Veins \| 1909 Dorsal aorta and umbilical veins \| 1912 Heart \| 1912 Human Heart \| 1914 Earliest Blood-Vessels \| 1915 Congenital Cardiac Disease \| 1915 Dura Venous Sinuses \| 1916 Blood cell origin \| 1916 Pars Membranacea Septi \| 1919 Lower Limb Arteries \| 1921 Human Brain Vascular \| 1921 Spleen \| 1922 Aortic-Arch System \| 1922 Pig Forelimb Arteries \| 1922 Chicken Pulmonary \| 1923 Head Subcutaneous Plexus \| 1923 Ductus Venosus \| 1925 Venous Development \| 1927 Stage 11 Heart \| 1928 Heart Blood Flow \| 1935 Aorta \| 1935 Venous valves \| 1938 Pars Membranacea Septi \| 1938 Foramen Ovale \| 1939 Atrio-Ventricular Valves \| 1940 Vena cava inferior \| 1940 Early Hematopoiesis \| 1941 Blood Formation \| 1942 Truncus and Conus Partitioning \| Ziegler Heart Models \| 1951 Heart Movie \| 1954 Week 9 Heart \| 1957 Cranial venous system \| 1959 Brain Arterial Anastomoses \| Historic Embryology Papers \| 2012 ECHO Meeting \| 2016 Cardiac Review \| Historic Disclaimer

| Carnegie stage 22

Stage 22 Embryo - Cardiovascular
Section	Name	Description
	C6L	L and R common carotid arteries. L and R internal jugular veins.
	C7L	L brachiocephalic vein (transverse anastomosis of L, R jugular veins). L common carotid artery. Brachiocephalic trunk.
	D1L	Aortic arch. Thymus (retrosternal). Trachea. Oesophagus. Large L and R jugular veins.
	D2L	Aortic arch. L jugular lymph sac lying laterally with hemiazygos joining it. Trachea. Oesophagus. Draining of azygos vein into R jugular vein.
	D3L	Ascending aorta attached cranial to transverse pericardial sinus. Superior vena cava expanding into R jugular vein. Trachea (bifurcation). Oesophagus. Azygos (R) and hemiazygos (L) veins.
	D4L	Ascending aorta. Pulmonary trunk and arteries. Thoracic aorta. Oesophagus. Bronchi. Note azygos vein on right, and precursor of hemiazygos vein on left side. (Image excerpt different scale from previous images)
	D5L	Superior vena cava. Ascending arch of aorta. Pulmonary trunk with the other two semilunar valves. Sinus above one valve and branching of pulmonary trunk into L and R pulmonary arteries.
	D6L	Superior vena cava. Ascending aorta with transverse pericardial sinus behind. Semilunar valve at origin of pulmonary trunk. L. atrium and auricle. Thoracic aorta.
	D7L	R atrium with R venous valve. R ventricle close to origin of pulmonary trunk. L.ventricular wall and three semilunar valves of aortic ostium.
	E1L	Section through all four chambers of heart. left ventricle- outflow tract close to origin of ascending aorta. Deep coronary sulcus and transverse pericardial sinus. right atrium- R venous valve of the inferior vena cava, the small septum secundum, the aperture in the dorsal part of septum primum (ostium secundum). (The foramen ovale arises later with the elongation of the septum secundum). left atrium- entrance of the L and R pulmonary veins and the auricle.
	E2L	Section through all four chambers of heart. Ventricles. Right venous valve. Between the tiny ridge of the septum secundum of the R atrium and the R venous valve. right atrium- drainage of the inferior vena cava (cf. E3). R atrioventricular canal. Septum primum. left atrium- drainage sites of R and L pulmonary veins.
	E3L	Section through all four chambers of heart. Ventricles. Diaphragm and liver. Pericardium and cavity. R atrium and two cusps of the atrioventricular valve. L atrium and its auricle. Thoracic aorta. Inferior vena cava. Coronary sinus.