hEAR DEVELOPMENT PT 2

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17 Terms

1
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Chamber Maturation

The process where atrio-ventricular endothelial cushions form valves and partition the heart's chambers and outflow tract.

2
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Septation Process

The expansion of endothelial-like cells in endocardial cushions leading to the partitioning of the heart's atria and ventricles.

3
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Endocardial Cushions

Fused structures in the atrio-ventricular canal critical for the development of heart valves.

4
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Atrial Septation

The division of the atria through the formation of septum primum and septum secundum.

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Ostium Primum

An opening that forms in the septum primum during atrial septation.

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Ostium Secundum

An opening that develops due to apoptosis in the upper region of the septum primum.

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Foramen Ovale

An opening allowing blood flow between the right and left atrium during fetal development.

8
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Septum Primum

A structure growing from the dorsal roof of the heart contributing to atrial septation.

9
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Septum Secundum

A structure that grows from the anterior face of the atrium, maintaining an opening to allow blood flow.

10
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Blood Flow Regulation

The process ensuring proper separation of oxygenated and deoxygenated blood between the heart's chambers.

11
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Atrioventricular Septation

The division of primitive atrium from primitive ventricle, forming the atrioventricular valves.

12
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Ventricular Septation

The formation of interventricular septum separating the right and left ventricles.

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Ductus Arteriosus

A fetal blood vessel connecting the pulmonary artery to the aorta, allowing blood bypass lungs.

14
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Postnatal Changes

Physiological adjustments occurring after birth, including the closure of the ductus arteriosus.

15
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Patent Ductus Arteriosus

A condition where the ductus arteriosus remains open after birth, causing abnormal blood flow.

16
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Closure of Foramen Ovale

The process by which the foramen ovale closes after birth, preventing right-to-left atrial shunting.

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Heart Development

A dynamic process involving gene expression changes that leads from progenitor cells to a four-chamber heart.