The coronary sinus, which opens into the ________, is where the majority of the cardiac veins empty.
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waste items
As ________ are eliminated, nutrients and other necessary components are transferred from capillary blood into the fluids surrounding the cells.
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human heart
The ________ is a muscular, four chambered organ that is about the size and form.
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epicardium
The ________ is made up of the serous membrane's visceral layer.
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heartbeat
The vibrations in the blood and tissues brought on by the closure of the valves are what produce the noises that are associated with the ________.
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fundamental rhythm
It is referred to be the pacemaker of the heart because it establishes the ________ of the heartbeat.
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endocardium
The epicardium, myocardium, and ________ are the heart wall's three outer, middle, and interior layers, respectively.
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constant flow
Its role is crucial because the tissues require a(n) ________ of oxygen, nutrients, and waste products from metabolism to exist.
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proper blood
There are two different kinds of valves in the heart that maintain ________ flow.
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sinoatrial node
The ________ regularly initiates impulses 70 to 80 times per minute even in the absence of brain input.
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Murmurs
________ are abnormal cardiac noises.
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Systole
________ is the cardiac cycle's phase of contraction, while diastole is its phase of relaxation.
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major veins
The valves at the bases of the ________ exiting the ventricles are known as semilunar valves, while those between the atria and ventricles are known as atrioventricular valves (also known as cuspid valves)
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single direction
The heart is no different from other pumps in need of a set of valves to maintain fluid flow in a(n) ________.
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Semilunar valves
________ close when the ventricles relax to stop blood flow back into the ventricles.
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bicuspid
The ________, or mitral, valve is located in the left atrioventricular chamber.
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Heart rate
________ may be influenced by extraneous variables including emotions, ion concentrations, and body temperature.
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Blood
________ leaves the lungs and travels through the left atrium and left ventricle.
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atrioventricular node
The ________, atrioventricular bundle, bundle branches, and conduction myofibers are further components of the conduction system.
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Systemic veins
________ deliver deoxygenated blood to the right atrium, whereas pulmonary veins deliver oxygenated blood to the left atrium.
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aortic semilunar valve
The ________ is the valve that connects the left ventricle to the aorta.
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fluid of growth
The ________ is blood, which carries hormones from glands throughout the body as well as nutrients from digestion.
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cardiac cycle
The conduction system controls the myocardium in the walls of the heart chambers as it alternately contracts and relaxes throughout one pulse, a process known as the ________.
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network of cardiac
Blood enters a(n) ________ (coronary) veins after passing via the capillaries in the heart.
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sinoatrial node
The ________ is the initial component of the conduction system.
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atrioventricular node
Regulating factors depend on the ________ to raise or lower the heart rate and modify cardiac output in response to shifting physiological demands.
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sinoatrial node
When operating alone, the ________ causes a steady rhythmic heartbeat.
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Flashcard (34)