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1. The Mishnah contrasts the prohibition of forbidden animal fat (Chelev) with the prohibition of blood.
2. The Gemara cites various verses that indicate that there is no Me'ilah with blood from Korbanos.
3. The general rule is that after the designated Mitzvah has been done with the particular item of Hekdesh, it is no longer subject to the prohibition of Me'ilah.
4. The Mishnah lists many parts of animals that can have the Tum'as Ochlin (the Tum'ah of food), but cannot have Tum'as Neveilah (the Tum'ah of animals that were not properly slaughtered).
5. The Beraisa lists a general rule which summarizes much of our Mishnah.
A BIT MORE
1. The Mishnah explains that many prohibitions apply to Chelev of a Korban, such as Pigul, Nosar, Tamei, and Me'ilah. On the other hand, Chelev applies only to domesticated kosher animals, whereas blood is prohibited from all animals and birds, whether kosher or non-kosher.
2. The Gemara also cites verses regarding how we know that there is Me'ilah with Chelev.
3. The Gemara mentions a few exceptions to this rule. For example, one is not allowed to benefit from the ashes that are removed from the Mizbe'ach during the Terumas ha'Deshen, even though the Mitzvah of those ashes has been completed.
4. These are two separate categories of Tum'ah. The Tum'ah of improperly slaughtered animals rests only on the meat of the animal, and not on items classified as other parts of the animal (such as its horns).
5. The rule is that, for a category of "light" Tum'ah, an item whose purpose is to protect another item combines with the main item to give it to the minimum Shi'ur for Tum'ah, but for a "severe" category of Tum'ah, the protective item does not combine with the main item.
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