Lecture #23 Embryology of the Cardiovascular & Lymphatic Systems Flashcards Preview

FTM Anatomy Group > Lecture #23 Embryology of the Cardiovascular & Lymphatic Systems > Flashcards

Flashcards in Lecture #23 Embryology of the Cardiovascular & Lymphatic Systems Deck (17):
1

Where does the heart develop from?

the mesoderm

Heart develops in the cardiogenic mesoderm anterior foregut and caudal to the oropharyngeal membrane

2

What does the pericardial coelom divide to?

– a ventral splanchnic layer
– a dorsal somatic layer

3

The splanchnic layer of the cardiogenic mesoderm, mesenchymal cells form two thin walled endocardial tubes called _______________.

the primitive heart tubes

4

The endocardium is derived from where?

Derived from the endothelial
cells lining the primitive heart tube

5

_____________ is formed from the splanchnic medoderm.

Myocardium

6

Where is the epicardium derived from?

Derived from mesothelial cells from the sinus venosus plus thickening of the splanchnic mesoderm

7

What is the direction of blood flow in the primitive heart tube?

Sinus Venosus → Primordial Atrium → Primodial Ventricle → Bulbous Cordis → Truncus Arteriosus.

8

At birth, the increased pressure on the left side pushes the ______________ against the ______________, closing the foramen ovale and completing the atrial septum.

septum primum against the septum secundum

9

What does the right and left horn of the sinus venous develop into?

Right horn: Smooth part of the right atrium (Sinus Venarum)
Left horn: Coronary sinus

10

What is derived from the Bulbs Cordis?

Conus Arteriosus on the right and Aortic Vestibule on the
left are derived from the Bulbus Cordis
(Smooth walled parts of the ventricles)

11

Trabeculae Carneae and papillary muscles are derived from ______________.

Rough walled part of the ventricles:
Trabeculae Carneae and papillary muscles are derived from the Primitive Ventricle

12

The truncus arterioles and partitions into what and is derived from where?

The Aorticopulmonary Septum is a spiral septum that divides the Truncus Arteriosus into Ascending Aorta and Pulmonary Trunk. This is derived from neural crest cells that have migrated to the area (truncal ridges).

13

The sinus venous forms:

A. pectinate muscles
B. trabeculae carneae
C. Ascending Aorta and Pulmonary Trunk
D. Conus arteriosus and Aortic vestibule – smooth part of ventricles
E. Smooth part of right atrium, Coronary sinus, and SA Node

E. Smooth part of right atrium, Coronary sinus, and SA Node

14

The Primordial Atrium forms?

A. Rough part of right and left atrium (pectinate muscles)
B. Rough part of right and left ventricles (trabeculae carneae)
C. Ascending Aorta and Pulmonary Trunk
D. Conus arteriosus and Aortic vestibule – smooth part of ventricles
E. Smooth part of right atrium, Coronary sinus, and SA Node

A. Rough part of right and left atrium (pectinate muscles)

15

The Primordial Ventricle forms?

A. pectinate muscles
B. trabeculae carneae
C. Ascending Aorta and Pulmonary Trunk
D. Conus arteriosus and Aortic vestibule – smooth part of ventricles
E. Smooth part of right atrium, Coronary sinus, and SA Node

B. Rough part of right and left ventricles (trabeculae carneae)

16

The bulbus cords forms?

A. pectinate muscles
B. trabeculae carneae
C. Ascending Aorta and Pulmonary Trunk
D. Conus arteriosus and Aortic vestibule – smooth part of ventricles
E. Smooth part of right atrium, Coronary sinus, and SA Node

D. Conus arteriosus and Aortic vestibule – smooth part of ventricles

17

The trunks arteriosus forms?

A. pectinate muscles
B. trabeculae carneae
C. Ascending Aorta and Pulmonary Trunk
D. Conus arteriosus and Aortic vestibule – smooth part of ventricles
E. Smooth part of right atrium, Coronary sinus, and SA Node

C. Ascending Aorta and Pulmonary Trunk