[Solved] Action potentials pass from one myocardial cell to another through areas of low electrical resistance called A)gap junctions. B)fibrous heart rings. C)electromagnetic discs. D)sarcolemma sclerotic plaques. E)tight junctions. Adult: A person who has reached the age of maturity, typically characterized by having achieved full physical development and legal responsibilities. Child's Body: Refers to the physical form and structure of a child, encompassing growth patterns, health issues, and anatomical development. Ossified: Turned into bone; a process of bone formation or becoming fixed and rigid in policy or practice. Healthy Babies: Refers to infants who are born without any medical conditions and continue to grow and develop well physically, mentally, and emotionally.