Compléter VERTEBRATE ANIMALS ACT 5Version en ligne This activity was created for Primary School, Science, Grade 3. par Gonzalo Barral 1 viviparous vertebrates womb milk air lungs bare skeleton Whales are marine mammals . They are because they have a made of bones . They are because they are born from their mother's . They drink their mother's . They have skin . They breathe through so they need to get oxygen from the . This is why they come to the surface .