The Rambam writes (Hilchos Machalos Asuros Perek Beis Halocha Gimmel):
האדם--אף על פי שנאמר בו "ויהי האדם, לנפש חיה" (בראשית ב,ז), אינו בכלל
מיני חיה בעלת פרסה; לפיכך אינו בלא תעשה. והאוכל מבשר האדם או מחלבו,
בין מן החי בין מן המת--אינו לוקה. אבל אסור הוא בעשה, שהרי מנה הכתוב
שבעת מיני חיה ואמר בהן "זאת החיה אשר תאכלו" (ויקרא יא,ב)--הא כל שהוא
חוץ מהן, לא תאכלו; ולאו הבא מכלל עשה, עשה הוא.
Translation by Rabbi Eliyahu Touger:
With regard to humans: Although [Genesis 2:7] states: "And the man
became a beast with a soul," he is not included in the category of
hoofed animals. Therefore, he is not included in the [above]
prohibition. Accordingly, one who partakes of meat or fat from a man
- whether alive or deceased - is not liable for lashes. It is, however, forbidden [to partake of human meat] because of the positive
commandment [mentioned above]. For the Torah [Leviticus 11:2] lists
the seven species of kosher wild beasts and says: "These are the
beasts of which you may partake." Implied is that any other than they
may not be eaten. And a negative commandment that comes as a result of
a positive commandment is considered as a positive commandment.
[As a side point - if you stick your hand into a pot of boiling soup do you need shishim? I remember seeing an answer somewhere that taste does not come out of something that is alive..]