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Frog Internal and External Anatomy
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Terms to know!!
• Dorsal—the back or upper surface of an organism
• Ventral—the stomach or lower surface of an organism
• Anterior—head end of an organism
• Posterior—tail end of an organism
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Internal Mouthparts
Esophagus
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• Maxillary teeth –around the upper edge of the jaw; Holds
• Vomerine teeth - used to hold the prey and keep it in place till they can get a good grip on it and squash their eyeballs down to swallow their meal.
• Eustachian tube - Openings in the mouth -lead to ear
– equalize air pressure.
• Glottis - opening at back of mouth leads to lungs; gas exchange
Esophagus -Tube - connects the mouth to the stomach – tranports
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• Tongue – attached at front of mouth
– Extends to catch insects
• Eye sockets – on top part of mouth; Helps push food down the throat
• Internal Nares – on top of mouth; allow gases in and out
• Nictitating Membrane – clear eyelid; protects the eye
• Tympanum Membrane – Ear drum; detects high pitched sounds
• Dermis- SKIN – covers frog; Keeps moist and allows gas exchange
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Initial Cut!
First – Pin frog down Second – Using Forceps lift skin and cut – Make “I” cuts Third – using forceps Lift muscle and cut
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When you open your frog and see this..
• You have a female frog
• Ovaries
– Filled with eggs
• Remove them
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Heart - 3 chambers – pumps bloods (circulatory system) Found above liver Lung- exchanges Carbon Dioxide and Oxygen – found behind liver
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Liver – secretes bile and processes digested food molecules found under muscle layer Bile – fluid produced by liver that aids in digestion of fats Gall Bladder – sac that stores bile – found between liver lobes
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Stomach – stores food and mixes it with enzymes to begin digestion – found behind liver Fat bodies - masses of fat needed for hibernating and mating- found behind stomach and small intestines
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Small intestine – digests and absorption of digested food – found below stomach Large intestine - stores undigested food – found below small intestine
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Kidney – Filters the blood and removes wastes to make urine. – found back of abdominal cavity near spine
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• Bladder – collects and stores urine until released – found near cloaca
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• Spleen – organ in the circulatory system that makes, stores, and destroys blood cells – found behind small and large intestine
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FEMALE REPRODUCTUCTIVE ORGANS
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MALE REPRODUCTUCTIVE ORGANS
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