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Heart is completely 4 chambered in
Option: 1
Aves
Option: 2
Crocodiles
Option: 3
Mammals
Option: 4
All of these
Answers (1)
Class Aves - Characteristics Features -
- Birds have streamlined bodies covered with feathers.
- Their forelimbs are modified into wings.
- The hind limbs are covered with scales and help in walking, swimming or clasping tree branches.
- Skin is dry. There is no gland.
- They have a bony endoskeleton. They have light and porous bones called pneumatic bones to assist flight.
- They have a monocondylic skull.
- They have a strong breast bone called keel to which the flight muscles are attached.
- They have a four chambered heart.
- They are warm blooded.
- They are dioecious. Fertilization occurs internally. They are oviparous.
- The jaws are modified to form beak.
- They lack urinary bladder.
- They are uricotelic.
- They consist of additional chambers, Crop and gizzard. Three chambered cloaca.
-
Birds, mammals and crocodile (only reptile) have four chambered heart.
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