What bloodletting method is used when dissecting chickens?

1 chicken's mouth is 8 cm deep, the blade cuts the maxillary vein upward, and the chicken is quickly inverted for 2-3 minutes to bleed.

By making a deep incision on the ventral side of the neck of the chicken, the carotid artery of the chicken can bleed.

Make a shallow incision at the junction of chicken skull and atlas, and you can see the medulla oblongata and cerebral artery, and it is bleeding into the cerebral artery. (If the chicken struggles violently, it can pluck the flying feathers, insert them into the foramen magnum, and smash the brain marrow. )

4 heart bloodletting method, open the chest of the chicken and insert the needle into the heart to draw blood.