After the Mishna discusses which kohanim are entitled to portions of sacrificial meat, Reish Lakish derives from the verse "the kohen who offers it shall eat it" that only those who perform the service may partake, excluding a tvul yom and mechusar kipurim. The Gemara challenges this, noting that priests on weekly rotation receive a share even if they did not offer that sacrifice, and that minors also eat despite being unfit for service. The verse is therefore reinterpreted to mean that those "fit for service" may receive a portion, though others, such as children, may still partake in eating. This raises a difficulty regarding blemished priests, who are unfit for offering yet still receive a share. To resolve this, the verse "all male kohanim" is understood to include them, and the Gemara analyzes why a tvul yom is excluded while a blemished priest is included.

Reish Lakish further asks whether a blemished kohen who is also impure may receive a portion. Raba cites the case of the kohen gadol who, while an onen (mourner on the day of a relative's death), works in the Temple but cannot eat, and does not receive a share to eat later - showing that eligibility requires fitness for eating. Rav Oshaya raises a similar question about a kohen who is impure in a situation where impurity is permitted for communal offerings, and Ravina responds with the same proof from the kohen gadol, again affirming that fitness for eating is required.

The Mishna states that an onen may touch sacred items, which contradicts a Mishna in Chagiga 21a requiring immersion for sacrificial items (kodashim). Three resolutions are offered: first, that our Mishna refers to before immersion, though this is rejected since immersion does not remove aninut; second, distinguishing between one who was careful to avoid impurity that conveys tumah but not impurity that disqualifies, versus one who was careful in all respects; and third, that our Mishna refers to touching, while Chagiga refers to eating. A source is brought to prove that there could be situations where one is careful about one type of impurity and not another, a distinction that carries halakhic consequences.

Since the Mishna rules that an onen does not receive a share, it seems to imply that he may nevertheless eat sacrificial meat. Yet this conflicts with Pesachim 91b, which teaches that an onen may immerse and eat the Passover sacrifice at night but not other offerings. The resolution distinguishes between Passover, where eating is permitted due to its unique requirements, and other sacrifices throughout the year. This leads to mention of a debate between Rabbi Yehuda and Rabbi Shimon over whether nighttime aninut is biblical or rabbinic, since the permission for the onen to eat the Passover sacrifice rests on Rabbi Shimon's view that it is rabbinic. However, a braita suggests that Rabbi Shimon holds aninut at night to be a Torah law. Two possible resolutions are offered to reconcile this apparent contradiction.