2.1Development of Primitive Heart TubePrimordium:Cardiogenicarea0004660PericardialcoelomEctodermCardiogenicareaNotochord
2.1 Development of Primitive Heart Tube Primordium: Cardiogenic area
Intraembryonic coelom → pericardial coelom;2 lateral cardiogenic plates →endocardial heart tubes-NeuralcrestPericardialcoelomDorsalEctodermaortaCardiogenicareaNotochordAEndocardial4tubeEpimyocardialcellsPericardialcoelom
•Intraembryonic coelom → pericardial coelom; •2 lateral cardiogenic plates →endocardial heart tubes Pericardial coelom
Lateral fold: 2 heart tubes → single heart tuberansversesinus-NeuralcrestDorsalaortaEndocardialtubeEpimyocardialcells-NeuralcrestIntra-Pericardialembryonic-Foregutcavitycoelom,Dorsal-mesocardiumFusingendocardialEpimyocardium-CardiachearttubesjellyBEndocardialtube
•Lateral fold: 2 heart tubes → single heart tube. Transverse sinus
Head fold: pericardial coelom -→ ventral to heart tubecaudalto oropharyngeal membranePericardialConnecting-AmnioncavityNeuralplatestalkCardiogenicAllantoisareaA1ProchordalNotochordplateAAmnioticCloacalmembranecavityForegutHindgutA1B1HearttubeHearttubeBBuccopharyngealDorsalPericardialmembraneB1mesocardiumcavityCloacaPericardialcavityCloacalmembrane
•Head fold: pericardial coelom → ventral to heart tube caudal to oropharyngeal membrane
2.2 Formation of Heart Loop2.2.1 Heart tubebulbus cordisventricleThree dilationsatriumFirstaorticarch1.Sinusvenosus2.TruncusarteriosusBulbuscordis3.BulbuscordisVentricle4.Ventricle5.AtriumAtrium6.Cardinal veinsMesenchymeo
2.2 Formation of Heart Loop 2.2.1 Heart tube bulbus cordis ventricle atrium Three dilations 1. Sinus venosus 2. Truncus arteriosus 3. Bulbus cordis 4. Ventricle 5. Atrium 6. Cardinal veins