Blubus Cordis
-Superior portion of the primitive heart tube, desdends and moves anterolaterally, forms a major part of RV
Primative Ventricle
-Forms the majority of left ventrile and moves laterally in the chest
Primative Atria
-Is located on the inferior aspect of the heart tube and moves posterior and superioly (looping around) to form atria
Sinus Venosus
Truncus Arteriosus
Interventricular Septation
Endochardial Cushion Tissue
- Problems commonly with trisomy 21
Membranous Septal Defects
Atrial Septation
Down Syndrome
1st aortic Arch
-Maxillary artery gives rise to middle meningeal that exits through foramen spinosum and can lead to epidural hematomas
2nd aortic arch
-Stapedial artery
3rd aortic arch
- Pouch 3 is 9th CN, which innervates carotid baroreflex
4th aortic arch
- Pouch 4 is CN 10 which innervates the baroreflex
Aortic arch 6
-Pulmonary artery and ductus arteriosus
Eryhtropoesis in fetal life
Fetal hemoglobin
-Has decreased affinity for 2,3 BPG which leads to stronger bonding with oxygen, allowing it to be picked up at umbilical vein
Fetal Circulation
Ductus Venosus
Ductus arteriosus
- Becomes ligamentum arteriosum
Ligamentum Arteriosum
Foramen ovale
Changes at Birth
Inflation of lungs leads to decreased pulmonary pressure and increased LAP this closes foramen ovale.
Umbilical Arteries remnant
-Medial umbilical ligaments