Structure in birds that helps ensure that air flows one way through the lungs ________________ (6 letters total)

Muscular organ in birds that helps in the mechanical breakdown of food _______________ (7 lettersl)

Ventral part of a turtle shell ________________ ( 8 letters)

Structure in birds made mostly of protein that can aid in flight and temperature control ________________ (7 letters)

Structure in birds where food is stored and moistened _______________ (4 letters)

Structure with a protective shell and membranes that allow an embryo to develop outside of water ___________________ (11 letters total)

Animal that relies on interactions with the environment to control body temperature ________________ (9 letters)

Animal that generates its own body heat ________________ (9 letters)

Hidden Word _________________ (8 letters)