Internal anatomy of a bird: a warm-blooded animal with two wings, two feet, a horny beak and a body covered with feathers.
Spinal column: part of the nervous system with the spinal column.
Lung: saclike respiratory organ.
Kidney: blood-purifying organ.
Ureter: duct that carries urine from the kidney to outside the body of a bird.
Cecum: cul-de-sac of the intestine.
Rectum: last part of the intestine.
Intestine: last part of the digestive tract.
Gizzard: last pocket of the stomach of a bird.
Liver: bile-producing digestive gland.
Heart: blood-pumping organ.
Crop: pocket formed by the bulding of the esophagus.
Esophagus: first part of the digestive tract.
Trachea: first part of the respiratory system.
Buccal cavity: chamber of the mouth.