The flattening of the action potentials of myocardial contractile cells, called the plateau phase, is due to a combination of K permeability and Ca2 permeability.

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explanation:

answer; the code in musculoskeletal system subsection is associated with deep tissue possibly to the bone;

plants absorb water from the soil by osmosis. root hair cells are adapted for this by having a large surface area to speed up osmosis. the absorbed water is transported through the roots to the rest of the plant where it is used for different purposes: it transports dissolved minerals around the plant.