The second aliyah again refers to the place that G-d will in the future designate as the one place to offer sacrifices, which will be Yirushalayim.
The second aliyah continues by discussing the slaughter of meat for ordinary consumption. In Chapter 12, pussok 21, G-d says that we may slaughter animals in the manner that was described (previously), and this is a place where the written Torah refers to the Oral Torah which was also given to Moshe on Mt. Sinai. This aliyah also says that we should not eat the blood of animals, and that we should observe and hear all the commandments. Rashi says this refers to the study of the Oral Law. The Torah says that the reward for both of these is that it should go well with us and for our children after us.