A large, dome-shaped muscle at the bottom of the ribs forces air into and out of the lungs.
An animal whose body controls and regulates its temperature by controlling the internal heat it produces.
Give birth to young that have developed on the mother's uterus until their body systems are fully functional.
is an organ in pregnant females that passes nutrients and oxygen to and remove waste from the developing embryo.
mammals in which the young have a short period of development within the mother's baby. After which they experience a period of development inside a pouch.
What are the three species of monotremes?
The three species of monotremes are the platypus and 2 species of echidna (spiny anteaters).