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The heart is innervated by vagal and sympathetic fibers. The right vagus nerve primarily innervates the SA node, whereas the left vagus innervates the AV node; however, there can be significant overlap in the anatomical distribution. Atrial muscle is also innervated by vagal efferents, whereas the ventricular myocardium is only sparsely innervated by vagal efferents. Sympathetic efferent nerves are present throughout the atria (especially in the SA node) and ventricles, including the conduction system of the heart.
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What are some diseases that occur in the heart?
Coronary heart diseaseCardiomyopathyCardiovascular diseaseIschemic heart diseaseHypertensive heart diseaseInflammatory heart diseaseValvular heart diseaseHeart Cancer
What disease or illness can directly affect the heart?
Coronary heart diseaseCardiomyopathyCardiovascular diseaseIschemic heart diseaseHeart failureHypertensive heart diseaseInflammatory heart diseaseValvular heart diseaseHeart cancers
Is the apex of he heart superior or inferior to the rest of the heart?
The apex of the heart is inferior to the rest of the heart. The base is superior to the rest of the heart.
What is the difference between an abnormal heart rhythm and a heart murmur?
Abnormal heart rhythm is a problem in the electrical system of the heart Heart Murmur- is a heart sound associated with a valve problem
What is slightly enlarge heart?
The heart enlarges to compensate for conditions in the body that affect heart flow and functions of the heart. It would be more telling to know which side of the heart is enlarged or if the whole heart.
What is the cardioacceleratory center?
innervates SA and AV nodes, heart muscle, and coranary arteries through parasympathetic fibers in the vagus nerves
Which division of ANS innervates the sweat glands and the hair follicles?
The sympathetic division innervates the sweat glands and hair follicles.
Which division of the ANS innervates the sweat glands and the hair follicles?
The sympathetic division innervates the sweat glands and hair follicles.
How do the nervous and circulatory systems interact?
The brain and spinal cord send messages to the heart and blood vessels via the peripheral nervous system, specifically the sympathetic and parasympathetic divisions. The sympathetic nervous system innervates the heart and causes an increases heart rate and force of contraction; it also innervates the blood vessels and can produce either constriction of the blood vessels or relaxation. The parasympathetic nervous system innervates the heart as well, but reduces heart rate and force of contraction. With few exceptions, the parasympathetic nervous system does not innervate the blood vessels. As a consequence of this innervation, the peripheral nervous system regulates heart rate and blood pressure.
Which nerve innervates knee extension?
OBTURATOR
The nerve that innervates the abductor pollicus brevis in most people is called?
The nerve that innervates the abductor pollicis brevis in most people is the median nerve.
Which branch of peripheral nerve innervates the limbs?
Sensory
What innervates velar muscles?
Cranial Nerve V
What is the nerve which innervates the vas deferens?
The testicular nerve and the nerve to the cremaster innervate the vas deferens in the spermatic cord.
How does the cardioscular system and the nerves system work together?
The autonomic nervous system regulates the cardiovascular system. The parasympathetic division innervates the heart via the vagus nerve. The sympathetic division also innervates the heart, but additionally, it supplies innervation to the smooth muscle lining blood vessels. The sympathetic division has a substantial effect on blood pressure, and on local blood flow, via constriction of arterioles.The cardiovascular system is important to maintain supply of oxygen and nutrients, and removal of wastes, from the nervous system.
When a preganglionic neuron innervates several postganglionic neurons it is called what?
divergence
A motor neuron together with the muscle fiber it innervates?
it is the motor unit
