internal features of the heart

Question 1

what is sulcus terminalis

Answer 1

The lateral wall of the right atrium is
marked by a vertical groove known as
sulcus terminalis that

Question 2

what is crista terminalis

Answer 2

the sulcus terminalis corresponds to a
vertical ridge in the cavity of the right
atrium called the crista terminalis

Question 3

what is atrium proper and sinus venarum

Answer 3

atrium proper is the anterior part of the atrium which consist of the muslce ridges called as the musculi pectinati and the sinus venarum is the posterior smooth part of atrium

Question 4

what is the level of the following structures in the sinus venarum
opening of the corronary sinus, SVC and IVC

Answer 4

1)Opening of the superior vena cava:
Lies at the upper part, opposite the
right 3rd costal cartilage.
Has no valves.
2)Opening of the inferior vena cava:
Lies at the lower part, opposite the
right 6th costal cartilage.
Guarded by a rudimentary
valve called valve of the inferior
vena cava.
3)Opening of the coronary sinus:
Lies between opening of inferior
vena cava and tricuspid orifice.
Guarded by a valve called valve of
coronary sinus.

Question 5

what are the only structures that open into the atrium proper

Answer 5

anterior cardiac

veins

Question 6

name the structure that separates the smooth out flowing part of the RT atrium form the rough inflowing part

Answer 6

supraventricular crest

Question 7

what is the smooth outflowing part of the RT ventricle called as

Answer 7

infundibulum or conus arteriosus

Question 8

what structure provides as a shortcut from the right bundle branch
allowing coordinated contraction of the anterior papillary muscle

Answer 8

septomarginal trabeculae or moderator band

Question 9

Outflowing part of The part of the left ventricle,
below the aortic orifice and is
called the ______

Answer 9

aortic vestibule