Introduction to Vertebrate Animals

In this section, the speaker introduces vertebrate animals and explains the classification into five groups: mammals, birds, fish, amphibians, and reptiles.

Vertebrates Classification

• Vertebrates have an internal articulated skeleton that supports their body movement.

• Mammals: Viviparous animals born from their mother's womb. They have mammary glands for milk, teeth for chewing, breathe through lungs, are warm-blooded, and mostly covered in fur.

• Birds: Hatch from eggs, walk on two legs with wings for flying. Lightweight skeleton due to hollow bones. Breathe through lungs and are warm-blooded.

• Fish: Aquatic animals hatching from eggs with fins for swimming and scales covering their bodies. Breathe through gills and are cold-blooded.

• Amphibians: Born from eggs in water, breathe through gills initially then lungs as adults. Cold-blooded with moist skin undergoing metamorphosis.

• Reptiles: Born from eggs with scaly bodies; some lack limbs like snakes. Cold-blooded creatures breathing through lungs.