From which germ layer do blood cells initiate

Question

From which germ layer do blood cells initiate? What are other organs as well as tissues made from that germ layer?

Answer 1

Blood cells encompass a mesodermal embryonic origin. Other organs made by mesoderm are: covering serous membranes such as the pericardium, peritoneum and the pleura, cartilages, adipose tissue, dermis, kidneys, urethra, bladder, ureters, gonads, blood and lymph vessels, bones and the muscles.