Molecular clouds may collide with each other, or a nearby supernova explosion can be a trigger, sending shocked matter into the cloud at very high speeds. Alternatively, galactic collisions can trigger massive starbursts of star formation as the gas clouds in each galaxy are compressed and agitated by tidal forces.
Coordinated contractions of cardiac muscle cells in the heart propel blood out of the atria and ventricles to the blood vessels of the left/body/systemic and right/lungs/pulmonary circulatory systems.This complex mechanism illustrates systole of the heart.ardiac muscle cells, unlike most other tissues in the body, rely on an available blood and electrical supply to deliver oxygen and nutrients and remove waste products such as carbon dioxide. The coronary arteries help fulfill this function.
Smooth muscles are used in involuntary actions, which a person doesn't consciously control, like digesting food. Cardiac muscles are found in the heart, and control the actions of the heart, like pumping blood.They are a form of smooth muscle.They're all similar in that they're all a type of muscle, all of them contract and expand to complete their jobs, and they all control various forms of movement. cardiac and skeletal muscles have one thing in common, that is they are both striated in contrast to the smooth muscles commonly found in the GIT. however the main diffe â¦ rence between them is that cardiac muscles function involuntarily while skeletal muscles are under conscious control.