<span> cardiac muscle differs from skeletal muscle
in that it is highly branched with cells connected by overlapping
projections of the sarcolemma called intercalated discs. These discs
contain desmosomes and gap junctions.</span>
Its the second option....................................... :)
A macromolecule is a large molecule containing many atoms. The four type are carbohydrates, lipids, proteins, and nucleus acids.
