The seventh aliyah discusses the tithe of animals, where every tenth newborn animal is to be brought as a sacrifice to the Temple, the meat of which is then given to the owners and their guests to eat.
This is the conclusion of Sefer Vayikra, which began with parshas Vayikra several weeks ago. In that parsha G-d called Moshe to the Mishkan for the first time after it was built and began the installation of the priests and the laws of their service in the Mishkan. This book of the Torah is also known as Toras Kohanim (Law of the Kohanim) because most of the laws that we've seen over the last few weeks have been about the Kohanim either directly or indirectly.
Chazak