The ________ is the kidney's sole blood supply.
A) celiac trunk
B) abdominal aorta
C) hepatic artery
D) renal artery
E) superior mesenteric artery
Question 2
During gastrulation,
A) the blastomeres fuse.
B) the placenta penetrates the endometrium.
C) three germ layers are formed.
D) cells from the hypoblast move to the epiblast.
E) the neural tube closes.