Blood is drained from the liver by the
A) inferior vena cava.
B) celiac trunk.
C) hepatic vein.
D) hepatic portal vein.
E) both the hepatic vein and the hepatic portal vein.
Question 2
Which embryonic germ layer forms the brain and spinal cord?
A) ectoderm
B) endoderm
C) trophoderm
D) epiderm
E) mesooderm