Earthworm is one of the most common annelids that we come across. It is a deposit feeder and shows extracellular digestive system consisting of a digestive tract along with the digestive organs. The digestive tract is a specialized tube in which the digestive contents move in one direction from the mouth to the anus. The esophagus, crop, gizzard, and intestine are the common digestive organs found in Annelids, such as the earthworm, insects, such as grasshopper, and birds, such as pigeon (refer Figure 47.4 (A), (B), and (C)).

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Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 47, Problem 4TYK

Summary Introduction

Introduction:

Earthworm is one of the most common annelids that we come across. It is a deposit feeder and shows extracellular digestive system consisting of a digestive tract along with the digestive organs. The digestive tract is a specialized tube in which the digestive contents move in one direction from the mouth to the anus. The esophagus, crop, gizzard, and intestine are the common digestive organs found in Annelids, such as the earthworm, insects, such as grasshopper, and birds, such as pigeon (refer Figure 47.4 (A), (B), and (C)).

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You are confronted with two worms that, on first glance, appear to be very similar. Upon closer examination, however, you note one difference that allows you to identify one specimen as an earthworm and the other as a roundworm. That key characteristic is: A. The presence of a gastrovascular cavity B. The presence of a body cavity C. The presence of a muscle layer around the digestive tract D. The absence of a specialized gas exchange surface E. None of the characteristics listed above would allow an earthworm to be distinguished from a roundworm

Which of the following has a complete digestive system? a. tapeworms c. cnidarians b. sponges d. earthworms

As you examine the small intestine from superior to inferior, you should notice that the diameter of the inside lumen of this organ A. Gets larger B. Stays the Same C. Gets smaller D. Changes, but is not visible without a microscope The enlarging or stretching of a vessel is called: A. Abduction B. Pronation C. Adduction D. Dilation

Answer 2

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Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 47, Problem 4TYK

Summary Introduction

Introduction:

Earthworm is one of the most common annelids that we come across. It is a deposit feeder and shows extracellular digestive system consisting of a digestive tract along with the digestive organs. The digestive tract is a specialized tube in which the digestive contents move in one direction from the mouth to the anus. The esophagus, crop, gizzard, and intestine are the common digestive organs found in Annelids, such as the earthworm, insects, such as grasshopper, and birds, such as pigeon (refer Figure 47.4 (A), (B), and (C)).

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Answer 3

Question

Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 47, Problem 4TYK

Summary Introduction

Introduction:

Earthworm is one of the most common annelids that we come across. It is a deposit feeder and shows extracellular digestive system consisting of a digestive tract along with the digestive organs. The digestive tract is a specialized tube in which the digestive contents move in one direction from the mouth to the anus. The esophagus, crop, gizzard, and intestine are the common digestive organs found in Annelids, such as the earthworm, insects, such as grasshopper, and birds, such as pigeon (refer Figure 47.4 (A), (B), and (C)).

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Answer 4

Question

Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

Chapter 47, Problem 4TYK

Summary Introduction