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Why are the intestines of many sea cucumbers and sea urchins greatly elongated compared to sea stars
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- Why is the digestive system of these animals called incomplete?Vertebrates have a complete digestive system, which means that their digestive tract has two openings, a mouth and an anus. What are some of the evolutionary advantages among animals with a complete digestive tract?Why is the incisors of rodents (such as mice and rats) are larger than humans?
- Do you think that the digestive system of humans is similar to those of other animals? Where might you see the most prominent differences especially between humans and animals with different diets?In which part of the body of a mammal does physical digestion occurBirds do not have teeth. Do you think they have adaptations to processing different types of food, comparable to the diversity seen in mammals? If so, what might these adaptive differences be?
- Which of the following sets of adaptations most likely describes an organism with a carnivorous diet? sharp teeth for biting and tearing, shortened intestines, a small cecum and appendix flat teeth for grinding, long intestines, enlarged cecum and appendix both sharp and flat teeth, medium length intestines, small cecum and appendixEarthworms, grasshoppers, and birds all have what digestive structure? Check all that would apply gastric caecae. a pharynx. a larynx. a crop. an epiglottis.How does the digestive system of a nematode or annelid differ from that of a flatworm? In what ways is the digestive system of an annelid worm more efficient than that a flatworm?
- Does the type of diet of the insect affect the structure of organs/parts of the digestive system? Cite at least four structures and explain such adaptation. Make sure that each division of the digestive system should be represented. Elaborate in your own words.Many digestive enzymes are synthesized in the pancreas and released into the duodenum. Why do mammalian digestive systems go to the trouble of producing pepsin in the stomach? What does pepsin do that others do not?What might have been some evolutionary pressures acting on animals that led to the internalization of digestive systems?