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Copy of Biology Culminating: Frog Dissection
Transcript of Copy of Biology Culminating: Frog Dissection
removed muscles and bones Ventral View: abdomen with internal
organs Eggs Ventral View: Liver and Gall Bladder Ventral View: Heart Ventral View: Lungs Webbed Toes Tympanic Membrane Eyes Nasal Opening Q: Describe the colouration of the ventral and dorsal surfaces. A: Dorsal Surface: green colour, spots
Ventral Surface: lighter green colour Q: The eyes have no bony eye sockets. How does this help the frog to swallow its prey? A: A frog has two eye bulges on the roof of the mouth. Frogs blink when they swallow because they cannot chew their food. When frogs catches their prey with its tongue, their eye balls roll down their socket and the eye bulges move to help move the prey to the back of the throat so it can be swallowed. Tongue Mouthparts Glottis Esophagus Q: Why do you think the frog's tongue is forked? A: The frogs tongue is forked because reptiles use the tip of their tongues to smell for prey. Two tips will enable frogs to smell from which direction the prey is in. Cutting a hole in the seat where the cloaca is located. A: Frogs' legs are naturally spread apart, while human legs are close. Frogs also have triceps muscles in their legs to add more strength to jump; humans have triceps in our arms. Lastly, frogs don't have kneecaps (capellas), while humans do. Q: Compare the leg of the frog to the leg of a human. How are they different? Bone Muscle Blood vessels Q: Describe the interior of the frog's lung. The frogs lung contains many alveoli and has large surface area, filled with many capillaries used for gas exchange. Q: Describe the apperance of the inner lining of the stomach. How does it aid in breaking down food? A: The inner lining of the stomach contains a layer of rugae (ridges) covering the surface. It aids in churning and adding traction to breaking down food. Also, the rugae act as additional lateral space which eventually expands to increase the area of the stomach for more storage space. Rugae Q: How many lobes does the liver have? A: A frog has three lobes in its liver. (Right lobe, left anterior lobe, and left posterior lobe) Q: Name the mouthparts on a photograph taken of the inside of the frog's mouth. Tongue Glottis Eustachian Tube Esophagus Internal
Nostrils Vomerine Teeth Maxillary
Teeth Q: How many atrias and ventricles are in a frog's heart and a human's? Q: Identify the bones of the posterior leg in a photograph. A: A frog has two atrias (left and right) and one ventricle. A human has two atriums (left and right) and two ventricles. (left and right). Q: How does the size of the frog's lung interfere with the frog's ability to absorb oxygen? A: The surface area of a frog's lung is small, therefore, the lungs are only able to absorb a small amount of oxygen. Q: What contents were found in th frog's stomach? A: There were no contents found in the stomach. Q: How long is the small intestine in centimeters? A: The small intestine is approximately 12cm in length. Muscle Skin Internal Organs Skin removed Cutting through cloaca Removing muscles Liver Gall Bladder Bone Ventral View: Abdomen with peritoneum Peritoneum Skin Heart Dorsal view: Removed heart showing the conus arteriosus Internal view of the lungs Ventral view: showing esophagus, stomach, small and large intestine, and fat bodies Esophagus Small Intestine Large Intestine Stomach Q:How are the frog's kidneys and human's kidneys different? Digestive tract removed and unwound showing esophagus, stomach, small and large intestines. Stomach Small Intestine Large Intestine Frog's Kidneys Q: Compare the frog's brain to the human brain. Which region of the human brain shows the greatest increase in size relative to the frog's brain? Human's Kidneys Ventral view: kidneys, urethra, bladder, dorsal aorta, interior vena cava, renal arteries, and veins Kidneys Vena Cava Dorsal Aorta Veins A: The exterior appearance of a frog's kidneys are long ansd skinny while a human's kidneys are more wide, like cashews. Renal Arteries Bladder Ventral view: showing ovaries and testes Ovaries Testes Eye sockets Exposed internal organs with side panels of abdominal muscle removed Internal organs Abdominal muscles Dorsal view: cortex and cerebrum The Digestive Tract fat bodies large intestines small intestines Dorsal aorta Vena cava Renal arteries Veins Urogenital System A: The cerebral cortex front lobe shows the greatest size relative to the frog's brain.