This 28 piece clip art set features vertebrates (mammal, reptile, amphibian, bird, fish) and invertebrates (sponge, insect, jellyfish, clams, worm, sea urchin). Also included are a spinal column, a vertebra, and an illustration showing which animals are vertebrates and which are invertebrates.The set includes 14 PNG color illustrations, and 14 grayscale / blackline versions. These are high resolution (300 dpi) transparent background graphics. No watermarks will appear on the files that you down