The pouch is a fold of skin on the mother kangaroo's belly that serves as a protective and nurturing environment for the joey (baby kangaroo). It is lined with soft fur and contains the mammary glands, which provide milk for the joey.
After birth, the tiny, underdeveloped joey makes its way into the pouch, where it remains for several months, nursing and growing. The pouch opens and closes with the help of muscles, ensuring the joey's safety and comfort.