All of the structures below are components of the cardiovascular system. In the hierarchy or organization, which of these structures is the LEAST complex?
mitochondria
cardiac muscle tissue
contractile proteins (myosin, actin)
the heart
cardiac muscle cell
Ans- Mitochondria
According to the hierarchy or organisation there are levels of organisations. These are from simple to complex- organelle, cells, tissues, organ, organ system, organism, population, community, ecosystem and biosphere. Therefore, organelle being the most simple or least complex. Here, mitochondria is the organelle being the least complex. Cardiac muscle tissue is the tissue of heart , contractile proteins are arrangement of cells, heart is the pumping organ of the body and cardiac muscle cell is the basic cell of the heart.
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