What is the embryological origin of the superior vena cava?
A. The pharyngeal arches
B. The aortic sac
C. The umbilical veins
D. The cardinal veins
E. The vitelline veins
D. The cardinal veins
You might also like to view...
Which of the following gases has the highest partial pressure in saturated alveolar air?
A) oxygen B) nitrogen C) water vapor D) carbon dioxide E) carbon monoxide
Testosterone in the male and progesterone in the female are responsible for the development and maintenance of secondary sexual characteristics
Indicate whether the statement is true or false
Which of the following arteries does not branch off the aortic arch?
What will be an ideal response?
The superior-inferior dimension of the thoracic cavity increases due to contraction of the _______.
a. diaphragm b. sternocleidomastoid c. rectus abdominis d. internal intercostals e. transverse abdominis