Multiple choice

Which of the following foetal membranes provides the first blood corpuscles for circulation in embryo?

  1. Trophoblast

  2. Allantoise

  3. Yolk sac

  4. Amnion

  5. Chorion

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yolk sac is a source of blood cells. It also functions as a shock absorber, and helps to prevent desiccation of the embryo.