(Mishnah): If a woman was Mapeles (came out of her womb) a piece of flesh, if blood came out with it, she is Teme'ah. If not, she is Tehorah;

R. Yehudah says, in either case she is Teme'ah.

(Gemara - Rabanan): [What fell is a part of] the Makor. It 'grows' a piece.

R. Yehudah says, it is blood. It congealed, and became a piece.

(R. Yochanan): R. Yehudah was Metamei only [a piece that is one of] the four kinds (colors) of blood.

(R. Yakov bar Acha citing R. Shimon bar Ba citing R. Yosi bei R. Nehoriyah): The Halachah follows R. Yehudah.

R. Lazar heard, and said 'I do not accept this matter.'

(Shmuel): The Halachah follows R. Yehudah.

(R. Ze'ira): He (Shmuel) did not say that the Halachah follows R. Yehudah. Rather, he saw Rabanan conduct like R. Yehudah (this is what he meant).

(R. Yochanan citing R. Shimon ben Yochai): One tears [the piece]. If blood is found inside, she is Temei'ah. If not, she is Tehorah.

R. Eliezer ben Yakov taught [the following], and he argues with R. Shimon ben Yochai. "Dam Yihyeh Zovah bi'Vsarah'', and not [blood] in a Shefir or in a piece.