Janet Jackson -- Member of the Jackson 1 ... Caring for Joe

Janet Jackson has put her life on hold to take care of her dad while he recovers from 3 heart attacks, and she's the only member of the brood who made the trek to Brazil.

We're told Janet arrived in Brazil Tuesday to tend to her father, cancelling rehearsals for her upcoming tour. We're told Janet limited the access to ICU, where Joe was hooked up for nearly a week.

The good news ... Joe's now out of ICU and on the mend. He's eating solid foods and the goal is for him to regain enough strength so he can get on a plane and return to the U.S. for further treatment.

We're told La Toya and Jermaine were talking about flying over, but when Joe's condition improved they decided to wait until he came home.

If all goes well, Joe could return home as early as Monday.