Frog Dissection - Henry County Public Schools

Frog Dissection - Henry County Public Schools

Frog Dissection The mouth, nostrils, and eyes 1. Nictictating membraneProtects eyes (similar to an eyelid) 2.Tympanic membrane the ear drum Collects sound waves Allows frogs to hear

in water Examine the Mouth 1. Maxillary Teeth (along inner edge of upper jaw) 3. Vomerine Teeth (roof of mouth) Teeth are used to hold onto caught prey, do not use them to chew, they swallow prey whole!!

6. Opening to Eustachian tubes 2. internal Nares 8 Glottis

10.Internal Nares internal nostril openings on either side of the vomerine teeth. 11.Eustachian tube openings connenct mouth cavity and the tympanic membrane Help to equalize

internal ear pressure If the frog is male, these are near the openings to the vocal sacs which allow male frogs to make sounds 50.Vomerine teeth

Internal Structure -Female 31.Eggs 32.Oviduct tubes which carry the eggs after they have been made 22 Eggs 18 Liver 3 lobed structure that produces bile for lipid digestion and starch

Food does not pass through, but blood does Still considered as part of digestive system 9- Stomach 6 Ventricle of heart 12 small intestine The Heart 3 chambered structure 34.Conus

arteriosus 35.Atrium 36.Ventricle 19 Pericardium membrane that surrounds the heart. Heart Circulatory System

1. Ventricle 2. Right atrium 3. Left atrium 4. Sinus venosus Triangular sac underneath the heart Veins from all over the body empty here before going into the right

atrium Part of circulatory system The Lungs Lungs 2 sac like structures on either side of the heart Collect oxygen from air and transfer it to blood supply Part of respiratory system

7- Right Lung and 8 Left Lung Digestive system 16.Small intestine At lower end of the stomach Breaks soupy mixture from stomach into usable nutrients using bile from liver and enzymes from the

pancreas 17.Liver 18.Large intestine Collects waste from tissues and wastes that could not be absorbed by the small intestine.

19.Stomach secretes digestive juices to break down whole food swallowed by the frog into a soupy mixture 26.Spleen filters improperly functioning blood

cells; circulatory system 29.Teste 10 pancreas Secretes enzymes into small intestine 19 stomach 54 - pancreas Digestive system

16.Small intestine 19.Stomach 33.Gall bladder 11- Pylorus- muscular valve between the stomach and small intestine 23 Kidney Located in either side of the spine, near the dorsal side;

filter blood and urine that drains into the urinary bladder; excretory system 23 & 24 Kidneys 21 Fat Bodies 27 Urinary Bladder urine travels from the kidneys, down tubes called ureters to this bladder where it is

stored until emptied through the cloaca. 21 Fat Bodies Attached near kidneys Store fat for nourishment for the

gametes Much larger and more abundant in females 22-Testes Small, oval structure underneath kidneys

Sperm travels through the kidneys, down the ureters and out the cloaca. 23 & 24 Kidneys

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