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Majors animal: Internal anatomy of the pigeon (matching)

Larynx Opens and closes glottis during respiratory cycle and prevents foreign material from entering the lower respiratory tract
Trachea Conducts air to and from the lungs during respiration
Lungs Paired organs of respiration connected to air sacs permitting unidirectional flow of air
Heart Four-chambered organ (two atria, two ventricles) that receives oxygenated blood from the lungs and pumps it via the arteries throughout the body
Esophagus Transports food to the crop
Crop Stores ingested food to await passage to gizzard; found in seed- and grain-eating species
Proventriculus Mixes food with peptic enzymes for digestion
Gizzard Thick-walled, muscular pouch that pulverizes and churns food prior to its passage into the intestine; larger in seed-eating species
Pancreas Produces digestive enzymes that are released into the small intestine
Large intestine Continued digestion of food particles; transports feces to coprodeum of cloaca via peristalsis
Cloaca Common chamber for the collection of materials fromt the digestive, excretory, and reproductive systems prior to their discharge from the body; partitioned into a coprodeum, urodeum, and proctodeum as in reptiles
Uropygeal gland Secretes oily compound that coats feathers, preventing them from getting wet
Vasa deferentia Transport sperm from the testes to the urodeum of cloaca
Testes Produce sperm
Ovary Single organ (left only) that produces ova
Ureters Transport uric acid mixture from kidneys to the cloaca
Kidneys Paired organs that filter nitrogenous wastes from the blood and produce dry uric acid with little water that is transported to the urodeum of the cloaca, where it mixes with feces as it is released from the body
Auditory tube Channels sound waves to auditory receptors; similar to the ear canal of humans
Cerebellum Primarily a reflex center for the integration of skeletal muscle movements; responsible for coordination and balance
Optic lobes Process visual information from the eyes
Cerebrum Largest portion of the brain; interprets sensory impulses and coordinates voluntary movements
Created by: scandalouscanine