Answer:
Blood is stored within blood vessels in a closed circulatory system, which circulates unidirectionally (in one direction) from the heart around the systemic circulatory route until returning to the heart.
Explanation:
<span>The spicules have an important purpose for loosely constructed animal such as sponge. First of all, spicules give structure which is vital due to loose construction. Secondly, it protects from predators. This is similar to porcupine quills in serving to protect.</span>
They are found in bacteria and eukaryotes is false
P<span>ituitary hormones:
1. Act on breasts to induce milk production.
2. Make you sweat.
3. Can cause weight gain.
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