1.2 The Cardivascular System Flashcards
a transport system that carries gases, nutrients, hormones, and wastes, and other substances all around the body
cardiovascular system
This System is composed of the heart, blood vessels, and blood
cardiovascular system
a hollow somewhat cone-shaped organ that weighs less than a pound
heart
the area in the chest that is between the lungs and above the diaphragm
mediastinum
The apex or tip of the heart is directed (blank)
downward
the base points of the heart toward the (blank)
right shoulder
The (blank) vessels of the body are connected to the heart’s base
major
The heart has coverings–an outer one called the (blank)
parietal pericardium
the heart has coverings–an inner one called the (blank)
visceral pericardium or epicardium
The (blank) produce a lubricating fluid that allows the heart to beat smoothly in a frictionless environment
pericardial membranes
The heart is a muscular organ, its walls have (blank) layers
three
the name of the hearts three layers
the epicardium, myocardium, and endocardium
the (blank), the outermost layer, is the inner heart covering
epicardium
The (blank) is the muscular part of the heart wall and the part that actually contracts.
myocardium
The (blank) is the thin innermost layer that lines the heart cavities or chambers
endocardium
The four hollow chambers of the heart are (blank)
the right and left atria and the right and left ventricles
The atria are the (blank) chambers
receiving
the ventricles are the (blank) chambers
discharging or pumping
The blood goes into the (blank) and then fills the (blank)
atria, ventricles
When the ventricles contract, the blood (blank)
leaves the heart
The heart has (blank) valves that keep the flow of blood going in (blank) direction.
4, one
the hearts 4 valves
two atrioventricular (AV) valves and the two semilunar valves.
The AV valves are found between the (blank) and the (blank)
atria, ventricles
They prevent the back flow of blood from the ventricles to the atria.
atrioventricular (AV) valves
