Myocardial cells, with transverse lines, are innervated by vegetal nerves. It is an involuntary muscle with transverse lines and has the ability to contract excitingly.
A polyclonal antiserum, raised against a synthetic peptide matching part of the sequence of connexin43 (a rat cardiac gap-junctional protein), was used in combination with laser scanning confocal microscopy to investigate gap junction distribution in cardiac tissues from a range of mammalian species.