Marine Animals and Arthropods Digestive System

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Questions and Answers

What is the primary function of the teeth in the mouth?

  • To reduce the food into bits by tearing, cutting and grinding (correct)
  • To store food temporarily
  • To mix food with saliva
  • To move food towards the esophagus

How many permanent teeth do humans have, excluding the wisdom tooth?

  • 30
  • 24
  • 32
  • 28 (correct)

What is the name of the last molar in each jaw that may erupt between 17 and 25 years of age?

  • Premolar
  • Incisor
  • Canine
  • Wisdom tooth (correct)

How many types of teeth are there in humans?

<p>Two (C)</p> Signup and view all the answers

What is the shape of incisors?

<p>Chisel-shaped (A)</p> Signup and view all the answers

How many temporary teeth do humans have?

<p>20 (A)</p> Signup and view all the answers

What is the purpose of the collar cells in sponges?

<p>To beat flagella and capture tiny food particles (D)</p> Signup and view all the answers

Where does digestion take place in protozoa?

<p>In the food vacuole (D)</p> Signup and view all the answers

What type of digestive system is characteristic of coelenterates?

<p>Both intracellular and extracellular digestion (D)</p> Signup and view all the answers

In what type of animals does digestion occur within the cell?

<p>Porifera and protozoa (B)</p> Signup and view all the answers

What is the function of the gastrovascular cavity in coelenterates?

<p>To serve as an incomplete digestive tube (A)</p> Signup and view all the answers

Where does digestion take place in platyhelminthes?

<p>Extracellularly (C)</p> Signup and view all the answers

What is the function of the prostomium or lips in the mouth of Annelida?

<p>Grasping food (D)</p> Signup and view all the answers

What is the function of the calciferous glands in the esophagus of Annelida?

<p>Secretion of calcium carbonate (A)</p> Signup and view all the answers

What is the function of the pharynx in Annelida?

<p>Facilitates sucking in of food (A)</p> Signup and view all the answers

What is the function of the horny teeth in the mouth of some Mollusca?

<p>Rasping off food particles (A)</p> Signup and view all the answers

What is the function of the gizzard in Annelida?

<p>Grinding of food with the help of sand (A)</p> Signup and view all the answers

What is the site of digestion and absorption in Annelida?

<p>Intestine (A)</p> Signup and view all the answers

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