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To better understand the dog and cat anatomy, the visual diagrams and written descriptions below are intended to clarify the locations of various organs that you and your veterinarian may discuss during an office visit.
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Pictured below is a side view of a dog’s organs and their placement within the body. Notice where the stomach is located in the dog. You’ll quickly notice how similar the dog’s anatomy is to a human’s.
Internal anatomy of a dog: carnivorous domestic mammal raised to perform various tasks for humans.
Encephalon: seat of the intelluctual capacities of a gog.
Spinal column: important part of the nervous system.
Stomach: part of the digestive tract between the esophagus and the intestine.
Spleen: hematopoiesis organ that produces lymphocytes.
Kidney: blood-purifying organ.
Rectum: last part of the intestine.
Bladder: pocket in which urine collects before being eliminated.
Penis: copulative male sexual organ.
Testicle: sperm-producing male sexual organ.
Intestine: last part of the digestive tract.
Liver: bile-producing digestive gland.
Heart: blood-pumping organ.
Lung: respiratory organ.
Trachea: tube that carries air to the lungs.
Esophagus: last part of the digestive tract.
Larynx: part of a dog’s throat that contains the vocal cords.
©The Visual Dictionary - Anatomy of a Dog.
Below is a visual of the internal organs of a cat. Notice where the heart is located in the cat. We’ve included this diagram to give you a clearer understanding of where a cat’s organs are located inside the body. You’ll quickly notice how similar the cat’s anatomy is to a human’s.

Internal anatomy of a cat: carnivorous mammal of the feline family, with retractile claws. There are both wild and domestic varieties.
Encephalon: seat of the intelluctual capacities of a cat.
Lung: respiratory organ.
Spinal column: important part of the nervous system.
Stomach: part of the digestive tract between the esophagus and the small intestine.
Kidney: blood-purifying organ.
Colon: large intestine.
Small intestine: last part of the digestive tract.
Testicle: sperm producting sexual organ.
Bladder: pocket in which urine collects before it is elimitated.
Spleen: hematopoiesis organ that produces lymphocytes.
Liver: bile-producing digestive gland.
Heart: organ that pumps blood.
Trachea: tube carrying the air to the lung.
Esophagus: first part of the digestive tract.
Tongue: taste organ of a cat.
Oral cavity: chamber of the mouth.
Nasal cavity: chamber of the nose.
Larynx: part of a cat’s throat that contains the vocal cords.
©The Visual Dictionary - Anatomy of a Cat.
Below is a pictorial view of the internal organs of a bird and the corresponding descriptions. This illustration will help you better understand your bird’s internal system when you and the veterinarian discuss your bird’s health during an office visit.

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.
©The Visual Dictionary - Anatomy of a Bird.
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