The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

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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 31, Problem 2TYK

Summary Introduction

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

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A psydocoelomate refers to an animal with a A. functional body cavity lined by tissues derived from mesoderm and endoderm. B. functional body cavity lined by tissues derived only from endoderm. C. functional body cavity lined by tissues derived only from mesoderm. D. body cavity that does not function properly

If cells from the presumptive neural ectoderm of a frog gastrula are transplanted onto the surface of a second gastrula where skin would normally develop, the transplanted cells will still develop into tissues of the nervous system. This experiment shows that the transplanted cells areA. differentiated.B. totipotent.C. discontinuous.D. determined.E. endodermal.

In a developing human, the first organ to form is thea. heart.b. brain.c. notochord.d. liver.

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 31, Problem 2TYK

Summary Introduction

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

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Answer 3

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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 31, Problem 2TYK

Summary Introduction

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

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Answer 4

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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 31, Problem 2TYK

Summary Introduction

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

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Answer 5

Chapter 31, Problem 2TYK

Summary Introduction

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

Answer 6

Chapter 31, Problem 2TYK

Summary Introduction

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

Answer 7

Chapter 31, Problem 2TYK

Summary Introduction

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

Answer 8

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Answer 11

Ch. 31.1 - 1. What characteristics distinguish animals from...Ch. 31.1 - How does the ability of animals to move through...Ch. 31.2 - What is a tissue, and what three primary tissue...Ch. 31.2 - What type of body symmetry do humans have?Ch. 31.2 - What is the functional significance of the coelom?Ch. 31.2 - Prob. 4SB Ch. 31.3 - Which major groupings of animals defined on the...Ch. 31.3 - Prob. 2SB Ch. 31.4 - Prob. 1SB Ch. 31.4 - Prob. 2SB

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

Solution Summary: The author explains that a body cavity that separates the digestive system from the body wall but is not completely lined with mesoderm is called pseudocoelom.

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Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

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Chapter 31 Solutions

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

Solution Summary: The author explains that a body cavity that separates the digestive system from the body wall but is not completely lined with mesoderm is called pseudocoelom.

Concept explainers

Videos

Introduction: The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.

Want to see the full answer?

Chapter 31 Solutions

Introduction:

The gut of animals is separated from the body wall by a body cavity called coelom, which is lined by mesoderm. Acoelomates such as Platyhelminthes lack this cavity. In them, the mesoderm does not line the body cavity and is found scattered between the ectoderm and endoderm.