Cardiovascular System

right atrium

The coronary sinus, which opens into the ________, is where the majority of the cardiac veins empty.

waste items

As ________ are eliminated, nutrients and other necessary components are transferred from capillary blood into the fluids surrounding the cells.

human heart

The ________ is a muscular, four chambered organ that is about the size and form.

epicardium

The ________ is made up of the serous membrane's visceral layer.

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 ________.

fundamental rhythm

It is referred to be the pacemaker of the heart because it establishes the ________ of the heartbeat.

endocardium

The epicardium, myocardium, and ________ are the heart wall's three outer, middle, and interior layers, respectively.

constant flow

Its role is crucial because the tissues require a(n) ________ of oxygen, nutrients, and waste products from metabolism to exist.

proper blood

There are two different kinds of valves in the heart that maintain ________ flow.

sinoatrial node

The ________ regularly initiates impulses 70 to 80 times per minute even in the absence of brain input.

Murmurs

________ are abnormal cardiac noises.

Systole

________ is the cardiac cycle's phase of contraction, while diastole is its phase of relaxation.

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)

single direction

The heart is no different from other pumps in need of a set of valves to maintain fluid flow in a(n) ________.

Semilunar valves

________ close when the ventricles relax to stop blood flow back into the ventricles.

bicuspid

The ________, or mitral, valve is located in the left atrioventricular chamber.

Heart rate

________ may be influenced by extraneous variables including emotions, ion concentrations, and body temperature.

Blood

________ leaves the lungs and travels through the left atrium and left ventricle.

atrioventricular node

The ________, atrioventricular bundle, bundle branches, and conduction myofibers are further components of the conduction system.

Systemic veins

________ deliver deoxygenated blood to the right atrium, whereas pulmonary veins deliver oxygenated blood to the left atrium.

aortic semilunar valve

The ________ is the valve that connects the left ventricle to the aorta.

fluid of growth

The ________ is blood, which carries hormones from glands throughout the body as well as nutrients from digestion.

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 ________.

network of cardiac

Blood enters a(n) ________ (coronary) veins after passing via the capillaries in the heart.

sinoatrial node

The ________ is the initial component of the conduction system.

atrioventricular node

Regulating factors depend on the ________ to raise or lower the heart rate and modify cardiac output in response to shifting physiological demands.

sinoatrial node

When operating alone, the ________ causes a steady rhythmic heartbeat.