a. inside their cells | c. in a gastrovascular cavity |
b. in a gizzard | d. in a complete digestive tract |
Introduction:
Digestion and absorption are the primary phenomena that take place in the body after the ingestion of food. Majority of the digestion is accompanied with the help of enzymes and acidic environment which is provided in the stomach and intestine.
Answer to Problem 1SA
Correct answer:
Flatworms digest food inside their cells. Hence, the correct answer is option a.
Explanation of Solution
Reason for correct answer:
Option a. is given as “inside their cells.”
Flatworms are parasites, living in the human digestive system. They absorb the digested food from the gut. Flatworms do not need to break the food as it is digested by the digestive system of the host. So, they only need to absorb the nutrients from the gut of the host.
Reason for incorrect answer:
Option b. is given as, “in gizzard.”
The gizzard is present in the avian digestive system. It is used to grind the food in the digestive system of birds. Hence, option b. is incorrect.
Option c. is given as, “In gastrovascular cavity.”
The gastrovascular cavity is present in higher species. Flatworms belong to the family of Platyhelminthes, which do not have well developed digestive system. Hence, option c. is incorrect.
Option d. is given as, “in a complete digestive tract.”
The digestive tract is present in higher species. Flatworms belong to the family of Platyhelminthes, which do not have well developed digestive system. Hence, option d. is incorrect.
Hence, the options b., c., and d. are incorrect.
Flatworms are able to digest the food inside their cells in the absence of a well developed digestive system. Thus, the correct option is a.
Want to see more full solutions like this?
Chapter 36 Solutions
Bundle: Biology: Concepts and Applications, Loose-leaf Version, 10th + LMS Integrated MindTap Biology, 1 term (6 months) Printed Access Card
- ______ is a term used to describe abnormal gut function a. Functional bowel disorder b. intestinal dysbiosisarrow_forwardTapeworms sometimes infect humans, anchoring themselves to the wall of the small intestine. Based on how digestion is compartmentalized along the mammalian alimentary canal, what digestive functions would you expect these parasites to have?arrow_forwardthe largest population of bacteria live within the _____________. a. large intestine b. stomach c. esophagus d. small intestinearrow_forward
- Which of the following structural characteristics of a gastrointestinal tract contributes to chemical digestion? A. The typhlosole of an earthworm B. The crop of a bird C. The chelicerae of a spider D. The radula of a mollusc E. All of the abovearrow_forward* 4. Which structure does not belong to stomach? A. angular notch B. pyloric antrum C. antrum of stomach D pyloric canal E. fundus of stomacharrow_forwardThe main function of the mucus in the stomach is to _____. a. trap and kill ingested microorganisms b. enzymatically degrade complex nutrients c. protect epithelial cells from the acidified environment d. protect the microbiota from corrosive gastric juices e. delay the digestive process to maximize absorption.arrow_forward
- The first part of the large intestine is. O A. anal canal O B. rectum O C. colon O D. cecumarrow_forwardGiardia is a/an ___________ that invades the ___________ .a. flagellate, large intestine b. amoeba, small intestine c. ciliate, large intestined. flagellate, small intestinearrow_forward13. The___ is a system of connective tissue that supports the gastrointestinal tract and supplies it with blood, lymph, and nerves. A. seizure B. mesentery C. digestive tract D. jejunumarrow_forward
- Describe the three kinds of internal folds or projections that increase surface area in the small intestine. A Villi B.microvilli C.circular folds asaparrow_forwardOne-way passage of food through the digestive system of many animal groups allowsa. intracellular digestion.b. specialization of different regions of the digestive system.c. release of digestive enzymes into the gut.d. extracellular digestion.arrow_forwardTapeworms sometimes infect the human alimentary canal, anchoring themselves to the wall of the smallintestine. Based on how digestion is compartmentalized along the mammalian alimentary canal, whatdigestive functions would you expect these parasites to have?arrow_forward