There are four classes of this phylum that includes red algae , green algae , brown algae and algae blonde. Meskipun beberapa struktur seperti saluran pencernaan terdapat disepanjang tubuh cacing tersebut, tetapi yang lain seperti organ ekskresi terulang pada segmen demi segmen. Contoh: bintang laut dan teripang. Antena 4. Pisces live in the water , the animals of this class does not have the jaw so his mouth forms such as worms , breathing with gills.
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