Post on 16-Dec-2015
The mouth, nostrils, and eyes
1. Nictictating membrane-
Protects 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
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
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
23 – KidneyLocated 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.