Question

What would happen if intercalated discs are not present in the cardiac muscles ?

Answer 1

The primary role of the cross-bands is to hold the adjacent cells together by providing sites of strong adhesion. The gap junctions promote diffusion of ions between cells and allow waves of depolarization to spread over the entire heart by passing from cell to cell.
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Answer 2

Answer:

The intercalated discs present in the cardiac muscle play two major functions:

1. They help in holding the cells tightly and close to each other by proving strong adhesion to the cells. For example, desmosome is present between plasma membrane of adjacent cells and provides strong adhesion to them.

2. They help in cell-to-cell communication with the help of gap junctions. Gap junctions accomplish this task by allowing the passage to ions between cells. It ensures the synchronized contraction of the cardiac tissue.

Hence, if intercalated discs are nit present in the cardiac muscles then they might not contract properly and thus blood would not be pumped efficiently to other organs.