Initially, the implanted embryo obtains its nutrition by ________.
A) simple diffusion of nutrients from the uterine secretions
B) nutrient stores in the embryonic cells
C) the blood supply of the placenta
D) digestion of endometrial cells
Answer: D
Initially, the implanted embryo obtains its nutrition by ________.
A) simple diffusion of nutrients from the uterine secretions
B) nutrient stores in the embryonic cells
C) the blood supply of the placenta
D) digestion of endometrial cells
Answer: D