what is the alternative means of substance transport in animals without a circulatory system?why is blood important for larger animals?
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though diffusion but diffusion is very very slow process . blood important for larger animal because blood consist red pigment called haemoglobin . haemoglobin carry oxygen . I hope you understand
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Answer:In animals that do not contain a circulatory system, the transport of substances occurs by cell to cell diffusion. Blood is a fundamental means of substance transport for larger animals since, in these animals, tissues are distant from each other and from the environment thus making diffusion impossible.
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