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</p> Signup and view all the answers

    What is the shape of incisors?

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

    How many temporary teeth do humans have?

    <p>20</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</p> Signup and view all the answers

    Where does digestion take place in protozoa?

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

    What type of digestive system is characteristic of coelenterates?

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

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

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

    Where does digestion take place in platyhelminthes?

    <p>Extracellularly</p> Signup and view all the answers

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

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

    What is the function of the pharynx in Annelida?

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

    What is the site of digestion and absorption in Annelida?

    <p>Intestine</p> Signup and view all the answers

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