In my Artscroll siddur (prayer book), the Shacharis (morning) service includes extensive readings from the Talmud describing the Temple offerings, since reading those laws serves as a modern-day substitute for our inability to perform the offerings in the absence of the Temple in Jerusalem.
There are no corresponding readings in the siddur for the Minchah (afternoon) service, even though there were afternoon offerings when the Temple existed. Why is that?