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-> Cardiogenic plates
What happens during head and lateral folding?
Cardiac Tubes fuse and move ventral to foregut
Mesoderm Caudal to cardia tube:
What attaches to the heart to the pericardial cavity?
What connects both sides of the pericardial cavity?
Transverse Pericardial Sinus
Expansions within the Cardiac Tube ->
What forms within the cranial and caudal cardiac tube (4th and 5th chambers)?
- Cranial: Truncus Arteriosus
- Caudal: Sinus Horn
Cardiac Tube ->
What happens before and after the cardiac tube to form a U-Shape?
- The Cardiac Tube spirals
- Bulbus and Ventricle = U-shape
- -> bulboventricular loop
Two endocardial cushions form at the ____, and are called:
- ...form at the common Atrioventricular Canal and are called:
- Dorsal and Vental Atrioventricular Cushions
Fusion of Atrioventricular Cushions
The Septum Intermedium creates...
L & R atrioventricular Orifaces
Steps in Septation of Atrium
- Septum Primum -> ventral
- Attaches to Septum Intermedium Foramen Primum Closed
Diminishing gap btw. the Septum Primum & Suptum Intermedium
Foramen Secundum originates as
Perforations in the Septum Primum
Foramen Ovale forms in the
Foramen allows blood to flow through the
- R Atrium->
- (Fermen Secundom ->)
- L Atrium
(2) -> Right Atrium
- Primitive Atrium
- Sinus Horns
Right horn of sinus venosus ->
Embryonic R Atrium is characterized by...
pectinate muscles in the Right Auricle
What connects to lung buds
a single venous vessel grows from the L Atrium
What forms the smooth walled part of the L Atrium
incorperation of pulmonary vessels and it's branches into the L Atrium
The Spiral Septum divides the ___ & ___ to form ___ & ___
...Truncus & Bulbus to form Aortic and Pulmonary Trunk
The Conus Arteriosus is located...
Around the origin of he Pulmonary Artery in the Right Ventricle
-> Conus Arteriosus
Distal Part of the bulbus
Septation of future ventricles (2):
- Muscular Interventricular Septum
- Interventricular Foramen
Early Embryonic Circulation consists of:
- Tubular Heart
- Vitelline Arteries
- Vitelline Veins
Each Aortic Arch Recieves...
Aortic Arches arise from the ____
Supra Cardinal Veins ->
L and R Azygous
Azygous Veins that persist in
Secondary Centers of ossification appear in
Abnormal interstitial growth that leads to premature cessation of growth -> shortening of bones (limbs, base of skull and vertebral column)
Area of somatopleure committed to forming a limb
Localized proliferation of mesoderm, cvered by ectoderm
Chondrocranium develops from ___ ossification
- Occipial Somites
- Neural Crest Cells
Neurcranuim bones are derived from:
- Neural Crest Cells
- Occipital Somites (Chondrocranuim Only!)
Chondrocranium bones include:
Viscerocranium consists of ___ & ___
Face and Jaw