I've already asked a couple of questions on the counting of the 248 body organs, see the list. Lately, I asked some question on slavery and here's where those topics cross.
The Gemmorah in Kiddushin 24a and Rambam Avadim 5, 4-5 count the organs which damage sets the Cananian slave free:
ד. "כֵּיצַד בְּרָאשֵׁי אֵיבָרִים: הַמַּכֶּה אֶת עַבְדּוֹ בְּכַוָּנָה וְחָסְרוּ אֶחָד מֵעֶשְׂרִים וְאַרְבָּעָה רָאשֵׁי אֵיבָרִים שֶׁאֵינָן חוֹזְרִין יָצָא לְחֵרוּת"...
ה. "...אֶצְבְּעוֹת יָדַיִם וְרַגְלַיִם עֶשְׂרִים רָאשֵׁי הָאָזְנַיִם וְרֹאשׁ הַחֹטֶם וְרֹאשׁ הַגְּוִיָּה וְרָאשֵׁי הַדָּדִין שֶׁבָּאִשָּׁה. אֲבָל הָעֵינַיִם וְהַשִּׁנַּיִם הֲרֵי הֵן מְפֹרָשִׁין בַּתּוֹרָה:
When counting these 24 organs I noticed some controversies (should I post each as a different question?):
Mishnah in Ohalot (1:8) states that "מָאתַיִם וְאַרְבָּעִים וּשְׁמֹנָה אֵבָרִים בָּאָדָם, שְׁלשִׁים בְּפִסַּת הָרֶגֶל, שִׁשָּׁה בְכָל אֶצְבַּע," - there are 6 limbs in each finger, but for the slave each finger counts as one - why?
How come that this number - 24 limbs - excludes the organs mentioned in the Torah - the eyes and the teeth? The original Mishna in Negayim 6,7 deals explicitly with "ראשי אברים" - limbs that "protrude", that's why it does not mention neither the eyes nor the teeth.
The nose: while the fingers or the eyes are vital organs for slave's work, what about the nose? How can it be damaged - does it mean breaking the bone or losing the sense of smell?
Rambam continues: "אֲבָל הַמְסָרֵס עַבְדּוֹ בַּבֵּיצִים אוֹ הַחוֹתֵךְ לְשׁוֹנוֹ אֵינוֹ יוֹצֵא לְחֵרוּת שֶׁאֵינָן מוּמִין שֶׁבְּגָלוּי.". So what can be said about רֹאשׁ הַגְּוִיָּה, isn't it a hidden part?
The ears: Torah mentions hitting on the ear and making deaf, on the other hand, the Mishnah mentions ראשי אברים. What would happen if one cuts his slave's outer ear without impairing his hearing?