fall 2000 jenna hellack frog dissection jenna hellack fall 2000 dissection index frog legs hindlegs...
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Fall 2000Jenna Hellack
Frog Dissection
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Jenna Hellack Fall 2000
Dissection index
Frog legs
•Hindlegs are strong and muscular because they are used for jumping
•Forelegs provide balance and cushion the frog when it lands after jumping
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Jenna Hellack Fall 2000
Dissection index
Frog Toes
Fingers Toes
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Jenna Hellack Fall 2000
Dissection index
Frog Eye
• The frog has large bulging eyes
• The frog has 3 eyelids– 2 outer ones are the color of the frog’s body
and do not move– 3rd eyelid is a transparent membrane that
protects the eye while permitting the frog to see under water
• It also keeps the eye moist when the frog is on land
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Jenna Hellack Fall 2000
Dissection index
Eardrum and External Nares
• Behind the eye is the circular eardrum
• 2 openings in the nasal cavity-external nares are found toward the tip of the snout
– These will close when the frog is under water
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Jenna Hellack Fall 2000
Dissection index
The FrogEye
Eardrum
forelegs
hindlegs
Nasal Openings
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Jenna Hellack Fall 2000
Dissection index
Frog Skin
• Smooth, moist, and thin
• Frog can breathe directly through skin as well as with lungs
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Jenna Hellack Fall 2000
Dissection index
Coloration
• Notice the difference in coloring between the belly and the rest of the frog’s body
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Jenna Hellack Fall 2000
Dissection index
Frog Tongue
• Attached to the front of the mouth
• Sticky- used to catch insects
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Jenna Hellack Fall 2000
Dissection index
Frog Teeth
• Ridges along the inside of upper jaw are maxillary teeth
• 2 vomerine teeth are located toward the front of the upper jaw
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Jenna Hellack Fall 2000
Dissection index
Gullet & Eustachian tubes
• The gullet (throat) is the wide opening that leads to the esophagus
• On both sides of the gulled near the jaw hinges are openings to the Eustachian tube.– These lead to the eardrum
Gullet
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Jenna Hellack Fall 2000
Dissection index
Frog Mouth
Gullet
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Jenna Hellack Fall 2000
Dissection index
Female with eggsA female frog has ovaries which are easily identifiable if engorged with eggs.
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Jenna Hellack Fall 2000
Dissection index
Male The male's testes are a bright orange color.
Testes
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Jenna Hellack Fall 2000
Dissection index
Liver
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Jenna Hellack Fall 2000
Dissection index
Gall Bladder
44. Gall bladder
• Greenish sac attached to the liver
• It stores bile, which breaks down fats during digestion
40
38
44
46
5149
47
52
55
56
39
42 43
50
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Jenna Hellack Fall 2000
Dissection index
Stomach
•Below the liver
•Large and white
•On the right side as you look at the frog
•Connects esophagus to the small intestine
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Jenna Hellack Fall 2000
Dissection index
Small Intestines- absorbs nutrients
• The straight part of the small intestine is called the duodenum
• The coiled section is the ileum
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Jenna Hellack Fall 2000
Dissection index
Mesentery & Ileum
• The coils of the ileum are connected by thin, transparent membranes called mesenteries.
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Jenna Hellack Fall 2000
Dissection index
Large Intestine
• The small intestine widens to form the large intestine.• The lower portion of the large intestine is called the cloaca.
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Jenna Hellack Fall 2000
Dissection index
Pancreas
• In the mesentery along the inner curve of the stomach is the pancreas.
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Jenna Hellack Fall 2000
Dissection index
Spleen
49. Spleen
• In the mesentery of the coiled part of the small intestine
• Reddish, spherical structure
40
38
44
46
5149
47
52
55
56
39
42 43
50
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Jenna Hellack Fall 2000
Dissection index
Lungs
• 2 Lungs– Reddish-brown saclike structures
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Jenna Hellack Fall 2000
Dissection index
Frog Heart
• 3 chambers– 2 upper chambers- right and left atria– Lower chamber- ventricle
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Jenna Hellack Fall 2000
Dissection index
Kidney•2 dark-red kidneys attached to the back wall of the abdominal cavity
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Jenna Hellack Fall 2000
Dissection index
Urinary Bladder
52. Urinary bladder
• Urinary bladder empties into the cloaca
• Ureters-tubes leading from each kidney to the bladder
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Jenna Hellack Fall 2000
Dissection index
Frog internals- female
45. Stomach46. Small intestine47. Large intestine48. Pancreas49. Spleen51. Fat bodies52. Urinary bladder58. Ovary59. Oviduct
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Jenna Hellack Fall 2000
Dissection index
Internal Organs
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Jenna Hellack Fall 2000
Dissection index
Metamorphosis