Anhui Medical University 3)Components of the primordial cardiovascular system ●Arteries ●At the end of3 rd weeks Paired,the head end connect to cardiac tube ●Composition: -Abdominal aorta artery -Dorsal aorta -Aortic arch Cardiac tube d20 16
16 Arteries At the end of 3rd weeks Paired, the head end connect to cardiac tube Composition: - Abdominal aorta - Dorsal aorta - Aortic arch 3) Components of the primordial cardiovascular system d20 artery Cardiac tube Anhui Medical University
Anhui Medical University 3)Components of the primordial cardiovascular system ●Arteries Abdominal aorta:paired,the head end connect to cardiac tube,fused to form an aortic sac. Abdominal aorta Abdominal aorta Abdominal aorta d20 Early of 4w Later of 4w 17
17 Arteries Abdominal aorta: paired, the head end connect to cardiac tube, fused to form an aortic sac. 3) Components of the primordial cardiovascular system d20 Early of 4w Later of 4w Abdominal aorta Abdominal aorta Abdominal aorta Anhui Medical University
Anhui Medical University 3)Components of the primordial cardiovascular system ●Arteries Abdominal aorta:paired,the head end connect to cardiac tube,fused to form a aortic sac Dorsal aorta:paired,fused to form a single vessel at the 4th week vitelline artery:several paired,supply the yolk sac -umbilical artery:paired,allantoic artery,supply chorionic membrane Dorsal aorta Dorsal aorta Dorsal aorta umbilical artery Umbilical artery Vitelline vitelline artery artery d20 Early of 4w Later of 4w
18 Arteries Abdominal aorta: paired, the head end connect to cardiac tube, fused to form a aortic sac Dorsal aorta: paired, fused to form a single vessel at the 4th week - vitelline artery: several paired, supply the yolk sac - umbilical artery: paired, allantoic artery, supply chorionic membrane 3) Components of the primordial cardiovascular system Dorsal aorta Umbilical artery Vitelline artery Dorsal aorta Dorsal aorta d20 Early of 4w Later of 4w vitelline artery umbilical artery Anhui Medical University
Anhui Medical University 3)Components of the primordial cardiovascular system ●Arteries Abdominal aorta:paired,the head end connect to cardiac tube,fused to form a aortic sac Dorsal aorta:paired,fused to form a single vessel at the 4th week Aortic arch:6 pairs,connect dorsal aorta to aortic sac Aortic arch Aortic arch d20 Early of 4w Later of 4w 19
19 Arteries Abdominal aorta: paired, the head end connect to cardiac tube, fused to form a aortic sac Dorsal aorta: paired, fused to form a single vessel at the 4th week Aortic arch: 6 pairs, connect dorsal aorta to aortic sac 3) Components of the primordial cardiovascular system Aortic arch d20 Early of 4w Later of 4w Aortic arch Anhui Medical University
Anhui Medical University 3)Components of the primordial cardiovascular system ●Veins: Anterior cardinal vein:paired,from upper part of the body Posterior cardinal vein paired,from lower part of the body -common cardinal vein -sinus venosus (cardiac tube) Anteror/posterior cardinal vein anterior cardinal vein Primitive heart dorsal aorta posterior cardinal vein aortic arch intersegmental artery vitelline vein d20 umbilical artery Chorion umbilical vein 4 weeks vitelline artery 20
20 Veins: Anterior cardinal vein: paired, from upper part of the body Posterior cardinal vein : paired, from lower part of the body - common cardinal vein sinus venosus (cardiac tube) 3) Components of the primordial cardiovascular system 4 weeks d20 anterior cardinal vein posterior cardinal vein Anhui Medical University