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Frog Anatomy

Explore the intricate anatomy of frogs, including their external features like nostrils, tympanic membrane, and nictitating membrane, as well as internal structures such as the heart, lungs, and digestive system. Learn about the functions of organs like the kidneys, testes, and ovaries in this detailed guide.

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Frog Anatomy

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  1. Frog Anatomy

  2. External Anatomy • External nares or nostrils- Anterior openings for the entry or exit of air. • Tympanic Membrane - The eardrum - receives sound waves • Nictitating Membrane- A transparent part of a frog’s lower eyelid that moves over the eye to clean it and protect it.

  3. External Anatomy

  4. Mouth Anatomy • Eustachian Tube Openings: Openings in the mouth that lead to tubes that connect to the middle ear to equalize air pressure • Vomarine and Maxillary Teeth: Used for holding prey • Internal Nares (nostrils): Helps with breathing

  5. Mouth Anatomy • Esophagus: Tube leading to the stomach • Tongue: Helps with grabbing and swallowing prey • Glottis: Tube leading to the lungs

  6. Mouth Anatomy

  7. Internal Anatomy • Heart - Pumping organ of the circulatory system that has 3 chambers. The Left Atrium, The Right Atrium, and the Ventricle. • Stomach - Stores food and mixes it with enzymes to begin digestion.

  8. Internal Anatomy • Liver - Secretes bile and helps digest food and filters blood. • Lungs - Exchange point where carbon dioxide leaves and oxygen enters the blood; helps the frog breathe.

  9. Internal Anatomy • Pancreas - Gland which secretes digestive enzymes. • Gall Bladder - Sac which stores bile. • Spleen - Organ in the frog’s circulatory system that makes, stores, and destroys blood cells.

  10. Internal Anatomy • Small Intestine - The principal organ of digestion and absorption of digested food. • Large Intestine - Posterior organ of the digestive system which stores undigested food.

  11. Internal Anatomy • Cloaca - Organ through which the frog’s digestive waste and reproductive cells leave the body. • Fat Bodies - Masses of fat in the body cavities of frogs.  Needed for hibernating and mating.

  12. Internal Anatomy • Kidneys - Organs that filter the blood and remove the wastes to make urine. • Urinary Bladder - The organ that collects and stores urine until released.

  13. Internal Anatomy • Testes - Male sex organs that produce sex cells (sperm). • Ovaries - Organs of the female reproductive system that produce the eggs.

  14. Internal Anatomy

  15. Internal Anatomy

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