Which animal has no blood? Leia mais: Does every animal have blood
Some animals don't have blood or circulatory systems because they simply don't need them. Flatworms, for example, lack a circulatory system; gas exchange occurs directly through their skin. Oxygen goes right to their tissues, while nutrients are supplied by diffusing from the gut. Leia maisIn fact, many small creatures, such as amoebas, sponges and corals, […]
