Chullin 77 - July 16, 2 Av

If a bone is broken but the majority of its width is surrounded by flesh and skin, the animal is not considered a treifa—even if the break is above the knee joint (arkuva)—and the limb is not considered a limb severed from a living animal (ever min hachai). A case came before Rava where the bone was covered by a majority of "flesh" only when including soft sinews. Rava initially permitted this based on Rabbi Yochanan’s opinion that soft sinews are considered like meat for fulfilling the mitzva of eating the Pesach sacrifice. However, Rav Papa challenged this from Reish Lakish’s opposing view that such sinews do not count as meat, and the Gemara explains that Rabbi Yochanan ultimately retracted his position, rendering the case forbidden. The Gemara clarifies additional questions regarding broken bones surrounded by skin and flesh in different manners, in some of which the flesh is no longer actually attached to the bone.

The law of a ben pekua (a fetus found in its mother's womb after she was slaughtered) permits the fetus to be eaten without independent slaughter. This law also permits its placenta (shilya) to be eaten, as derived from the same verse from which the laws of ben pekua are derived. However, if even a small portion of the placenta emerged outside the womb prior to the mother's slaughter, it is forbidden to eat even the portion that remained inside out of concern that the head of the fetus may have emerged with it before the slaughter.

If an animal carrying its first offspring miscarries a placenta, one does not have to treat the placenta with the sanctity of a firstborn (bechor). This is because perhaps the fetus inside was a female, and even if it was a male, perhaps it was a non-viable anomaly that is not fit for firstborn sanctity (such as a sheep that looks like a goat). In contrast, the placenta of a consecrated sacrifice is treated with sanctity, as sacrifices can also be brought from female animals, and therefore the likelihood of it having sanctity is much higher.

The placenta is not considered food and therefore does not contract food impurity. Within this discussion, the Gemara inquires whether or not the hide of a domestic donkey that was cooked is susceptible to impurity.

The Gemara presents two different versions of a dispute between Rabbi Elazar and Rabbi Yochanan regarding a placenta that emerges alongside a visible fetus. They debate whether perhaps there is a (second) hidden fetus inside the placenta, with each version of their debate applying this concern to different circumstances.

Non-Jews used to bury placentas at intersections or hang them on trees as a superstitious remedy, and therefore these actions are forbidden under the prohibition of following non-Jewish customs (darchei ha-Emori). Regarding this, Abaye and Rava define the boundary, establishing that anything done for a proven medical remedy is permitted, while that which has no apparent medical benefit but is purely superstitious is forbidden.