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The contractions start from a node in the myocardiumcalled the SA node (sino-atrial node), which produces the stimulatory signals in a rhythmic mode. As the stimulatory signals move throughout the myocardial muscle, it contracts.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoThe outer surface of the heart, the epicardium, and the inner surface of the heart, the endocardium, are both epithelial tissue and not contractile. The middle layer of the heart, the myocardium, is the muscle tissue which contracts causing the heart to pump blood.
Wiki User
∙ 13y agoThe myocardium
Wiki User
∙ 12y agoThe myocardium
Wiki User
∙ 13y agoendocardium
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What is the thickest layer of the heart which is made up of muscle?
The thick muscle layer of the heart is the myocardium. It is the middle layer of the heart and produces pressure.
What is the absence of contractions of the heart?
Asystole
What caused by rhythmic contractions of the heart?
The pulse is caused by the rhythmic contractions of the heart. The pulse can be measured at superficial arteries in teh body.
What action pumps blood through the body?
The contractions of the heart
What starts the heart contractions?
The breathing and the cry.
Arteries rely on what to circulate blood?
heart contractions
How does the cardiovascular system increase pressure?
Contractions of the heart.
What is the major functions of cardiac muscles?
Heart Contractions
What are Repeated contractions of the cardiac muscles Called?
the heart
What is muscle layer of the heart?
The muscle layer of the heart is the myocardium (or cardiac muscle).
What is a medication that reduces heart rate and strength of heart contractions?
asprin,coreg,dixion
What is the condition of rapid and irregular or out of phase heart contractions?
fibrillation
