23. From which germ layer do
blood cells originate? What
are other organs and tissues
made from that germ layer?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Blood cells have a
embryonic origin. Other organs
from mesoderm are: covering
membranes like the pericardium,
peritoneum and the pleura, ,
cartilages, dermis, adipose tissue,
, ureters, bladder, urethra,
gonads, and lymph vessels,
bones.