The conducting system of the heart consists of cardiac muscle cells and conducting fibers (not nervous tissue) that are specialized for initiating impulses and conducting them rapidly through the heart (see the image below). They initiate the normal cardiac cycle and coordinate the contractions of cardiac chambers. Both atria contract together, as do the ventricles, but atrial contraction occurs first.
The conducting system provides the heart its automatic rhythmic beat. For the heart to pump efficiently and the systemic and pulmonary circulations to operate in synchrony, the events in the cardiac cycle must be coordinated.
The answer is C) high in fiber. Americans eat a lot of salty foods and drink a lot of milk so that means it can't be A, D or B.
Hi !
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<em>Question</em>
What are two effects of regular participation in sports on your overall health?
Answer:
<em>- increased muscle strength and greater heart efficiency</em>
Answer:
A disease in which the immune system eats away at the protective covering of nerves.
In MS, resulting nerve damage disrupts communication between the brain and the body.
Multiple sclerosis causes many different symptoms, including vision loss, pain, fatigue, and impaired coordination. The symptoms, severity, and duration can vary from person to person. Some people may be symptom free most of their lives, while others can have severe chronic symptoms that never go away.
Physical therapy and medications that suppress the immune system can help with symptoms and slow disease progression.
Explanation: this disease is very rare
A 22-year-old male was punched in the abdomen several times. You find him lying on his left side with his knees drawn up. He is conscious and alert and complains of increased pain and nausea when he tries to straighten his legs. His blood pressure is 142/82 mm Hg, his pulse rate is 110 beats/min and strong, and his respirations are 22 breaths/min and regular. In addition to administering high-flow oxygen, you should:
- transport him in the position in which you found him.
