1
Q
Cardiogenic Field
A
- Blood islands form in the visceral (splanchnic) layer of lateral plate mesoderm, cranial (in front) to developing brain
- Horseshoe-shaped endothelial tube (primitive heart) develops as blood islands coalesce
- Lateral body folding brings the 2 sides to the middle to fuse
2
Q
Cardiac Looping
A
Atria grows up and to the left
Ventricular grows down and right
3
Q
Ductus Venosus
A
Bypass liver, regulate BP
Takes blood from placenta to heart
4
Q
Foramen Ovale
A
Shunt btw L and R atrium
Bypassing pulmonary circuit
5
Q
Ductus Arteriosus
A
Connects pulmonary artery with aortic arch
Bypass lungs
6
Q
Cardiac Muscle Features
A
Intercalated discs
Striation
Central nuclei
Branching
Involuntary
Made from Mesoderm
Rely on T tubule system
Conducting cells
7
Q
Epicardium
A
Outer layer
Visceral pericardium
Simple squamous epithelium
Fibrocollagenous tissue
8
Q
Myocardium
A
Cardiac myocytes
Collagenous connective tissue
9
Q
Endocardium
A
Inner lining of atria and ventricles
Layer of simple squamous epithelium
Contain Purkinje fibers
