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Skin cells are also called epithelial cells
Blood enters the pulmonary vein with close to 100% of the blinding site for oxygen saturated.
Answer:
Most cells within planarians tend to be very close to their gastrovascular cavity, in addition to their external environments. Also, planarians have the ability for oxygen and carbon dioxide to diffuse through the cells on their body walls: this makes it unnecessary for these varieties of flatworms to need a dedicated bodily system.
I think the deficiency of dedicated respiratory and circulatory systems in Planarians does not cause a problem because none of their cells are far removed from the gastrovascular cavity or from the external environment. Planarians are free-living flatworms and form the class Turbellarians in the Phylum Platyhelminthes. Flatworms have three tissue layers, that is the ectoderm, mesoderm, and endoderm.
hope this helps!!!!!....
Explanation:
Answer:
i believe the answer would be 4 mph
Explanation:
the formula for speed is distance/time so 100/25 = 4. therefore your answer would be 4 mph. hope this helps:)
