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  •  Vertebrates haveOption: 1 Two chambered heartOption: 2 Three cham

 Vertebrates have

Option: 1

Two chambered heart


Option: 2

Three chambered heart


Option: 3

Four chambered heart


Option: 4

All of these


Answers (1)

best_answer

 

 

Phylum Vertebrata - Characteristics Features:

  • They are also called higher chordates.
  • The notochord is present only during the embryonic stage. It is replaced by the vertebral column or spine. 
  • They possess a well developed central nervous system with a brain and spinal cord.
  • They possess a well-differentiated head. The brain is surrounded by cranium or skull.
  • They have a closed circulatory system with two, three, or four chambered heart.
  • They have well developed respiratory, digestive, muscular and endocrine system.
  • The phylum Vertebrata is divided into two divisions as follows:
  • Agnatha : They lack true jaws and paired appendages. They have only one important class ? Cyclostomata
  • Gnathostomata : They possess true jaws and paired appendages. They have two important superclasses ? Pisces and Tetrapoda
     

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 Different classes of vertebrates have differently chambered hearts. Fishes have two  chambered heart. Amphibia and reptiles have three chambered heart. Birds and mammals  have four chambered heart.

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