The transverse flute is composed of three parts, the Headjoint, the Body and Footjoint.
Headjoint: The headjoint is the part where the flute's sound is produced. In the Headjoint we have the Lip Plate where we support our chin and lower lip and the Riser, which is the hole where we blow to produce the sound.
Body or middle joint: The body is the central part that contains the largest number of keys of the Flute's mechanism.
Foot (footjoint): The Flute foot is the smallest component, and it contains the rest of the keys. Some flutes have the foot that produces even the note C, and that's why we call it the Foot Flute in C, other flutes produce a note lower than the C, the note B, so we call it the Foot Flute in B. The B-footed flutes have an extra Key. See the photos below.
Padding: The pad has the function of sealing the air passage when keys are closed. Pads are made of felt and covered with fish skin. The Pads it's inside the keys of flutes.
Glossary of the Flute's mechanism and parts.