I am trying to filter targeted tissues ("heart", "muscle", "kidney", "liver") in my df which is pasted below and list name of species that have all of the targeted tissues.

my df:

Species,Tissue
Human,Kr_liver_2
Human,Heart
Human,Liver_556
Human,Kr_Kidney_2
Human,Kr_Muscle_2
Human,Kr_Brain_2
Mouse,Brain
Mouse,Kr_liver_3
Mouse,Kr_liver_5
Mouse,Kr_liver_27

I try the approach below but I got an empty output, however, the desired output based on the df above should be Human because it has all of the targetted tissues.

Tissue_check <- df %>%
  group_by(Species) %>%
  filter(all(grepl(paste(target_tissues, collapse = "|"), tolower(Tissue)))) %>%
  pull(Species) %>%
  unique()

How can I achieve this?