Techniques for blood collection from the rat include puncture of the heart, retro-orbital plexus, jugular vein, saphenous vein, tail blood vessels, carotid artery, abdominal aorta, and vena cava.

Without using any anti-coagulants, Firor attempted to establish cross circulation in over 40 pairs of dogs by suturing the carotid artery of each dog in a pair to the external jugular vein of the ...