Describe Osiris and Isis's role in the myth regarding the Egyptian afterlife?

Osiris was considered the god of the underworld, the afterlife, resurrection, and of the dead, according to Egyptian mythology.

Isis is also a goddess in Egyptian mythology. She was the sister and married to Osiris. She was the goddess of life and magic, and protected women and children, and healed the sick. She was one of the greatest goddesses of Ancient Egypt.