संचारण प्रणाली का विकास
- splanchnopleuric mesoderm ( source )
- intraembryonic coelom
- pericardial cavity
- Cardiogenic area
- two cardiogenic tubes are formed
- Fuse to form one cardiogenic tube
- Endothelial heart tube
- segments or compartments called dilatations
- आद्य हृद्कंद ( BULBUS CORDIS)
- आद्य धमनी तुंड / काण्ड ( truncus arteriosus )
- right superior and left inferior swellings
- fuse to form Spiral septum
- आरोही महाधमनी
- फुसफूसीय धमनी
- Continuous with धमनी थैली ( aortic sac )
- right and left pharyngeal arch arteries ( ग्रसनी चाप धमनी )
- आद्य निलय बाह्यवाह ( CONUS CORDIS )
- two bulbar ridges appear from the wall
- fuse to form bulbar septum
- grows down to fuse with
- interventricular septum but unable to fuse
- gap is left ( shunt )
- filled by AV cushions proliferation
- outflow tracts of right and left ventricle
- gets merged with primitive ventricle
- आद्य निलयकंद ( PROXIMAL PART )
- gets merged with primitive ventricle
- आद्य विलय ( PRIMITIVE VENTRICLE )
- आद्य आलय ( PRIMTIVE ATRIUM )
- arises from roof of atrium
- first arises septum primum to the left of septum spurium
- grows towards AV canal
- before fusing the connection between right and left side is called
- foramen primum
- After it fuses with it
- dividing it in to chambers but
- breaking of septum primum occurs
- resulting in formation of foramen secundum
- secondly arises septum secundum to the right of septum primum
- overlaps with free upper edge of septum primum
- now the gap is called foramen ovale
- Blood flows from right atrium to left atrium
- After birth left atrium starts receving oxygenated blood from lungs
- so the upper part that is septum secundum
- fuses with the lower part that is septum primum
- to form a complete septum and in adults
- lower free edge of septum secundum is called as annulus ovalis
- upper edge of septum primum is called fossa ovalis
- before forming of real chambers
- left atrial chamber
- when the septum primum appears
- single pulmonary vein opens in to left atrium
- it divides outside chamber in to
- right
- divides in to two
- gets absorbed in to left atrium
- pulmonary veins
- left
- divides in to two
- gets absorbed in to left atrium
- pulmonary veins
- right atrial chamber
- आद्य शिरा कोटर ( sinus venosus )
- आद्य दायाँ शिरानाल (right horn )
- हृदिय शिरा (right Cardinal vein)
- part of Superior venacava
- नाभि शिरा (right Umbilical vein)
- पीतक शिरा (right Vitelline vein)
- terminal part of inferior venacava
- Gets absorbed in to right atrium
- आद्य बायाँ शिरानाल ( left horn )
- हृदिय शिरा (left Cardinal vein)
- नाभि शिरा (left Umbilical vein)
- पीतक शिरा (left Vitelline vein)
- Gets Absorbed in to right atrium
- coronary sinus
- connected or separated by
- Bulbo-ventricular sulcus
- From floor of bulboventricular cavity
- interventricular septum
- meets the fused AV cushions ( septum intermedium )
- Atrio -ventricular canal (AV Canal)
- atrioventricular cushion appear on walls
- dorsal and ventral
- fuse to form septum intermedium
- right half of atrioventricular canal
- gets absorbed in to right atrium
- left half of atrioventricular canal
- gets absorbed in to left atrium
- Sino-Atrial orifice ( आद्य शिर निलय छिद्र )
- gradually it becomes narrow
- shifts to right
- forms a slit
- margins
- right margin
- expands to form
- crista terminalis
- valve of inferior venacava
- valve of coronary sinus
- left margin
- fuses to form
- septum spurium
- Primitive Aorta
- Ventral Aorta
- two ventral aorta fuse to form
- Aortic sac
- right horn
- 6 arterial arches
- left horn
- 6 arterial arches
- Dissapearing arches
- Greater part 1st and 2nd arch arteries dissapear
- 5th also dissapears
- 3rd and 4th arch arteries open in to ventral part of aortic sac
- spiral septum fuses with aortic sac in such a way that
- blood from aorta reaches
- only 3rd and 4th arch artery
- 3rd arch artery gives off a bud
- cranially to form external carotid artery
- 6th arch artery opens in to dorsal part
- Dorsal Aorta
- grown cranially
- beyond the point of attachment of first arch artery
- ductus caroticus dissapears
- Portion of right dorsal aorta dissapears
- between 4th arch artery and fusion of two dorsal aorta
- 6 th arc
- gives off series of lateral intersegmental branches
- 7 th cervical intersegmental artery
- supplies upper limb bud
- DERIVATIVES
हृदय का विकास
CELLS AND AREA
| Angiogenesis | वाहिकाजनन | |
| Cardiac progenitor cell | हृद प्रजनक कोशिका | |
| Vasculogenesis | वाहिकाजनन |
SAC AND OTHERS
| Aortic sac | महाधमनी थैली | |
| Auricle | आलयिका | |
| Bulboventricular loop | निलयकंद कुंडली | |
| Bulbus cordis | हृद्कंद | |
| Cardiogenic area | हृदजनक क्षेत्र | |
| Crista terminalis | अंतः कटक | |
| Ductus caroticus | ग्रीवः धमनी | |
| Epicardial ridge | अधिहृद कटक | |
| Epicardium | अधिहृद्स्तर | |
| Heart tubes | हृद नली | |
| Ligamentum.venosum | शिरा स्नायू | |
| Ligamentum arteriosum | धमनी स्नायू | |
| Mesocardium | मध्यहृद | |
| Myocardium | हृदपेशी | |
| Pericardial bar | परिहृद स्तम्भ | |
| Pericardial bulge | परिहृद उभाड़ | |
| Pericardial sac | परिहृद थैली | |
| Primitive aorta | आद्य महाधमनी | |
| Primitive atrium | आद्य आलिंद | |
| Primitive heart | आद्य हृदय | |
| Primitive ventricle | आद्य निलय | |
| Right horn | दाया किरट | |
| Sinus venarum |
WALLS AND SEPTUM
| Septum primum | प्रमुख आद्य पट | |
| Septum secundum | द्वितीय आद्य पट | |
| Septum spurium | मिथ्या आद्य पट | |
| Bulboventricular sulcus | निलयकंद परिखा |
HOLES
| Foramen ovale | अंडाकार छिद्र | |
| Foramen secundum | द्वितीय आद्य छिद्र |
VESSELS
| Ventral aorta | उदर-संबंधी महाधमनी | |
| Sinus venosus | शिरा कोटर | |
| Truncus arteriosus | धमनी तुंड / काण्ड | |
| Truncus chorii | तुंड | |
| Cardinal vein | हृदिय शिरा | |
| Dorsal aorta | पृष्ठ महाधमनी | |
| Ductus arteriosus | धमनी नलीका | |
| Umbilical vein | नाभि शिरा | |
| Vitelline vein | पीतक शिरा |
धमनी का विकास
| First aortic arch | प्रथम महाधमनी चाप |
Discussion