frog small intestine function
Best Results From
From Yahoo Answers
Question:In a frog, how does the length of the small intestine relate to its function in absorbing nutrients?
Answers:Animals that eat plants (food that has less nutrients and more fiber) need longer small intestines so the food has more time to digest and be absorbed (tadpoles). Adult frogs eat a richer, easier to digest, diet so they can have a shorter intestine.
Question:Yes, I would Google it, I'm not completely an idiot, but I'm on the school laptops and it blocks, like I'm not kidding, EVERYTHING!!!! LOL!
And also can you give a brief synopsis of their function?
Thank you soooo much!!!
Answers:ileum, jejunum, duodenum
they turn digested food into poop!
Question:Are the salivary gland, stomach, liver, pancreas, small intestine, and large intestine all part of the alimentary canal in the frog?
Answers:According to Wikipedia, the liver and pancreas are considered accessory organs to the alimentary canal. I assume that the salivary glands would be considered accessory organs as well because they aren't physically part of the actual path that food takes through the body as it is digested. Hope this helps!
1 Examine the external structure of a frog. To open its mouth, use scissors to cut the sides of the mouth slightly. Look inside. Identify each body part shown in the Figure below.
2 Compare the frog to a person. Use Table 1 to record similarities and differences you observe. Also record the functions of each body part.
3 Place the frog on its dorsal (back) side. Pin the legs to the pan.
4 The frog should now be in a position that will allow you to open its body cavity. Carefully use scissors to cut through the skin and muscle from between the hind legs all the way to the lower jaw. CAUTION: use care when cutting! NOTE: Do NOT cut too deeply. You do not want to damage the internal structures.
5 Cut through the bone in the chest region with scissors. Then cut the body wall toward the sides (see figure). Fold the tissue to each side and pin it to the dissecting pan.
6 Observe the internal organs. Some organs will be hidden from view. Those organs on top must be moved to the side in order to see all parts. NOTE: Female frogs are often filled with eggs. Use forceps to carefully remove the eggs in order to see the organs.
(PAGE 2 of 7)
Wait! Please read this before you begin the actual dissection:
Unlike humans, frogs don't store fat next to the skin. Frogs store winter fat in fat bodies, found inside the body cavity. If your frog was collected late in the year, the body cavity might be full of orange fat bodies.
Now you are ready to being the actual dissection. Please be respectful of your lab partners and of the specimen you are about to explore, observe, and learn from.
Take extra care with your dissecting tools. Your scissors are your most important tool, but be sure to handle them carefully and always double check before cutting.
1. Begin by pinning your frog on its back to the dissecting pan.
2 Follow the diagram on the right, and make the cuts shown through the thin belly skin.
You'll notice that skin is paper thin, and not tightly attached to the muscle underneath.
You will also find hard abdominal muscles right under the skin.
(PAGE 3 of 7)
3. Pin back the skin and open the body cavity the same way you opened the skin.
4. Now pin back the abdominal muscle to expose internal organs.
5. Push the 3-lobed liver to the left to expose the esophagus, which runs back from the mouth to the large, J-shaped stomach.
6. Now cut the esophagus as close to the mouth as possible.
7. Look for the stomach, which consists of a large, anterior cardiac portion and a smaller, posterior pyloric portion that ends at the pyloric sphincter. This circular muscle opens and closes the bottom of the stomach.
8. Now look for the first part of the small intestine. Called the duodenum, it is directly below the pyloric sphincter.
9. Behind the duodenum is the elongated and coiled ileum, which connects the small intestine to the large one.
10. Find the large intestine by looking for an obvious expansion of the alimentary canal in the posterior region of the body cavity.
11. Look for the gall bladder on the dorsal surface of the right lobe of the liver.
12. Now find the spleen. It is a dark, spherical organ in the intestinal mesentery, below the kidneys.
PAGE 4 of 7
LOCATE each of the organs. Check the box to indicate that you found the organs.
Fat bodies - spaghetti shaped structures that have a bright orange or yellow color, if you have a particular fat frog, fat bodies may need to be removed to see other structures. Usually they are located just on the inside of the abdominal wall.
Peritoneum - A spider web like membrane that covers many of the organs, you may have to carefully pick it off to get a clear view.
Liver - The largest structure of the body cavity. This brown colored organ is composed of three parts or lobes: the right lobe, the left anterior lobe, and the left posterior lobe. The liver is not primarily an organ of digestion; it does secrete a digestive juice called bile. Bile is needed for the proper digestion of fats.
Heart- at the top of the liver, the heart is a triangular structure. The left and right atrium can be found at the top of the heart. A single ventricle located at the bottom of the heart. The large vessel extending out form the heart is the conus arteriosis.
Lungs - locate the lungs by looking underneath and behind the heart and liver. They are two spongy organs.
Gall bladder - lift the lobes of the liver, there will be a small green sac under the liver. This is the gallbladder, which stores bile. (Hint: it looks like a booger).
Small intestine - leading from the stomach, the first straight portion of the small intestine is called the duodenum; the curled portion is the ileum. The ileum is held together by a membrane called the mesentery. Note the blood vessels running through the mesentery; they will carry absorbed nutrients away from the intestine. Absorption of digested nutrients occurs
Answers:Son, you have too much time on your hands.