Pars intermedia in the pituitary of the horse with remains of Rathke’s pouch

Organ: Pituitary, Tissue: Pars intermedia, Species: Horse. Comments: Pars intermedia, remains of Rathke’s pouch and part of pars distalis. In all domestic mammalian species, the pars intermedia contains many melanotrophs that secrete melanocyte-stimulating hormone (MSH).