The gastrovascular cavities are found in primitive animals. The animals do not undergo any changes over a period of evolution and remains the same as their ancestors. The marine animals are considered as primitive animals since they survived millions of years without a change in organs and organelles. The examples of primitive animals are sponges, coelenterates (jellyfish), lampreys, and horseshoe crabs.

Question

Want to see the full answer?

Answer 1

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 42, Problem 1TYK

Summary Introduction

Introduction: The gastrovascular cavities are found in primitive animals. The animals do not undergo any changes over a period of evolution and remains the same as their ancestors. The marine animals are considered as primitive animals since they survived millions of years without a change in organs and organelles. The examples of primitive animals are sponges, coelenterates (jellyfish), lampreys, and horseshoe crabs.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Which of the following is NOT a feature of a gas-exchange organ in animals? A. low surface area for gas exchange B. moist C. thin, delicate structure D. extensive blood flow

Mark the following statements as true or false. If a statement is false, correct it to make a true statement. a. The trachea contains O-shaped rings of hyaline cartilage. b. Goblet cells secrete serous fluid into the respiratory tract. c. The framework of the larynx is formed by nine pieces of cartilage, the largest of which is the thyroid cartilage. d. The pseudostratified ciliated columnar epithelium of the respiratory tract warms, filters, and humidifies the inspired air. e. The epithelium of the oropharynx changes from stratified columnar epithelium to simple squamous epithelium to enable it to resist abrasion from food.

A.The membrane on the surface of the lung. B.The membrane on the surface of the heart. C.The membrane that lines the wall of the abdominopelvic cavity. D.The membrane on the surface of the stomach. E.The thin, watery fluid located between the pleural membranes. F.The area of the thoracic cavity between the two lungs. G.The muscular structure that separates the thoracic and abdominopelvic cavities. H.The membrane touching the posterior surface of the sternum (breast bone) I.The membrane deep to ribs but superficial to pleural fluid. word choices Visceral pericardium parietal pericardium visceral pleura diaphragm serous fluid parietal peritoneum mediastinum parietal pleura visceral peritoneum

Answer 2

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 42, Problem 1TYK

Summary Introduction

Introduction: The gastrovascular cavities are found in primitive animals. The animals do not undergo any changes over a period of evolution and remains the same as their ancestors. The marine animals are considered as primitive animals since they survived millions of years without a change in organs and organelles. The examples of primitive animals are sponges, coelenterates (jellyfish), lampreys, and horseshoe crabs.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

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 42, Problem 1TYK

Summary Introduction

Introduction: The gastrovascular cavities are found in primitive animals. The animals do not undergo any changes over a period of evolution and remains the same as their ancestors. The marine animals are considered as primitive animals since they survived millions of years without a change in organs and organelles. The examples of primitive animals are sponges, coelenterates (jellyfish), lampreys, and horseshoe crabs.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

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 42, Problem 1TYK

Summary Introduction