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9 Cards in this Set

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  • Back
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A. What 2 tissue component of CVS are derived from epithelial?

B. What 3 tissue component of CVS are derived from epithelial?

C. What tissue component of CVS is derived from connective tissue?
1. Endocardium – epithelial
2. Epicardium – epithelial

B. Trabeculae – myocardium
Papillary muscle – myocardium
Conduction cells – specialized myocardium

C. Chordae Tendineae – connective tissue
Describe the 5 dilations of the primitive heart tube: sacculation of the PHT starting from the horns?
1. Sinus venosus
2. Primitive atrium
3. Primitive ventricle
4. Bulbus cordis
5. Truncus arteriosus

Aortic arch
1. What are the 3 afferent vessels of the PHT?

2. What are the 2 efferent end of the PHT?
1. Afferent/Inflow:

 common cardinal vv. (r. & l.)
 umbilical vv. (r. & l.)
 vitelline vv (r. & l.)

2. Efferent/Outflow:

 trucus arteriosus/aortic sinus
 aortic arches (r. & l.)
1. Bulbus cordis forms what?

2. What are the 2 parts of truncus arteriosus?
1. conus arteriosus (smooth part of right ventricle) amd aortic vestibule (left ventricle)

2a. truncus arreries?
2b. conus cordis
A. What are the Formation of these Heart Wall and Pericardium structures?

1. Endocardial tube
2. Myocardium
3. Epicardium
4. Fibrous pericard:
5. Periph. ser. peric:
B. What specifically forms myocardium and epicardium?

C. What specifically forms
4. Fibrous pericardium
5. Parietal. serous. pericardium
Formation of Heart Wall and Pericardium:

1. Endocardial tube: splanchn. mesoderm
2. Myocardium: splanchn. mesoderm
3. Epicardium: splanchn. mesoderm
4. Fibrous peicard: somatic mesoderm
5. Periph. ser. peric: somatic mesoderm

B. (2) and (3) are formed from myocardial sheath
(4) and (5) are derived from septum transversum
Whhat do these contribute to?

1. truncus arteriosus
2. bulbus cordis
3. primitive ventricle
4. primitive atrium
5. sinus venosus
6. Left and Right horn
1. truncus arteriosus:
-Asc. aorta
-pulmonary trunk

2. bulbus cordis: right ventricle

3. primitive ventricle: Left ventricle

4. primitive atrium: right and left atria

5. sinus venosus: right atria

6. Left and Right horn: right atria;

left horn = coronary sinus
right horn = sinous venous
1. What structures dissapear on the right side of the heart during development?

2. What are the remains of the right horn of sinuos venous and what does it receive?
1. The following disappear (right):

a. r. part of right ant. card. v.
b. r. post cardinal v.
c. r. umbilical v.
d. r. vitelline v.
Veinds of left side dissappear, completeluy!!
Right veins mostly dissapeear!, the ones that remain on the right side are bigggg so the venous side of body!
Left side is arterial side of our body!
This is right because we are looking from the back

2. Sinus venarium is the remains of the right horm of sinous venous and receives ivc, svc, cs on the right side!
Describe Atrial Septal Defect (ASD)?
It is caused by abnormal development of the septum primum or secondum, resulting in a patent foramen ovale. This congentinal heart defect shunts blood from the left atrium to the right atrium, causes hypertrophy of the right atrium, right ventricle, and pulmonary trunk, and thus mixing of oxygenated and deoxygenated blood.
What are the 4 roles of the endocardial cushions?
1. Divide Atrioventricular Canal
R. A-V Canal
L. A-V Canal

2. Help close ostium primum

3. Help form membranous interventr septum

4. Contribute to formation of atrioventr. valves