Answer:
This is internal skeleton. It is the yellow membrane that covers the inside surface of the gizzard or stomach of a chicken, and is therefore also known as chicken gizzard membrane. A good internal skeleton will be brownish-yellow in color, with longitudinal wrinkles on its surface, and will be dry and brittle when dried. Typically, the internal skeleton, when not dried, is about 3.5 cm in length and 3 cm in width.