Placed the parts of the human circulatory system in order from highest to lowest degree of internal organization

place the parts of the human circulatory system in order from highest to lowest degree of internal organization. The right answer is mentionned in the picture, Muscle cell ==> Muscle tissue ==> Heart ==> Human body.Explanation:

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

the answer would be 3