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45 Cards in this Set

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  • Back
Blood and Lymph. The blood, heart, and blood vessels form the
cardiovascular system
lymphatic system
he lymph, lymph nodes and lymph vessels form the
closed circulatory system
Higher animals, including humans, usually have a
The Central Organ of the Cardiovascular System is the
heart
is a hollow, muscular organ that contracts at regular intervals, forcing blood through the circulatory system-coned shaped
heart
The heart is tilted so that the ?
apex
The outer and inner layers are
epithelial tissue*.
The middle layer (the walls of the four chambers of the heart) is cardiac muscle tissue called the
myocardium*.
of the heart pumps blood from the body into the lungs, where oxygen poor blood (deoxygenated, usually shown in blue) gives up carbon dioxide and picks up oxygen.
right side
of the heart pumps oxygen rich blood (oxygenated, usually shown in red) from the lungs to the rest of the body except the lungs.
left side
The heart is enclosed in a protective membrane sac called the
precardium
The upper chambers of the heart are the
right and left atriums
The lower chambers are the
right and left ventricles
Vertically dividing the right and left sides of the heart is a common wall called the *
septum
Oxygen-poor blood from the body enters the right side of the heart through two large blood vessels called
vena cava
cardiovascular system
The blood, heart, and blood vessels form the
lymphatic system
he lymph, lymph nodes and lymph vessels form the
closed circulatory system
Higher animals, including humans, usually have a
The Central Organ of the Cardiovascular System is the
heart
is a hollow, muscular organ that contracts at regular intervals, forcing blood through the circulatory system-coned shaped
heart
The heart is tilted so that the ?
apex
The outer and inner layers are
epithelial tissue*.
The middle layer (the walls of the four chambers of the heart) is cardiac muscle tissue called the
myocardium*.
of the heart pumps blood from the body into the lungs, where oxygen poor blood (deoxygenated, usually shown in blue) gives up carbon dioxide and picks up oxygen.
right side
of the heart pumps oxygen rich blood (oxygenated, usually shown in red) from the lungs to the rest of the body except the lungs.
left side
The heart is enclosed in a protective membrane sac called the
precardium
The upper chambers of the heart are the
right and left atriums
The lower chambers are the
right and left ventricles
Vertically dividing the right and left sides of the heart is a common wall called the *
septum
Oxygen-poor blood from the body enters the right side of the heart through two large blood vessels called
vena cava
brings blood from the upper part of the body to the heart.
superior vena cava
brings blood from the lower part of the body to he heart
inferior vena cava
When the heart contracts, blood is squeezed from the right atrium into the right ventricle through flaps of tissue called a
atrioventricular valve (av)
The valve that separates the right atrium and ventricle is called the
tricuspid valve*
When the heart contracts a second time, blood in the right ventricle is sent through the
semi lunar valve* known as the *pulmonary valve* into
Oxygen-rich blood leaves the lungs and returns to the heart by way of blood vessels called the
pulmonary veins*.
blood enters the left atrium, it passes through flaps of tissue called
atripventricular valve (av)*
The valve that separates the left atrium and ventricle is called the
bicuspid* or *mitral valve*
From the left ventricle, blood is pumped through a *semi lunar valve* called
aortic valve
If any of the valves do not close properly, an extra sound called a
heart murmur*
The wave begins in a small bundle of specialized heart muscle cells embedded in the right atrium called the
sinoatrial node*
When the impulse initiated by the sa node reaches another special area of the heart known as the
atrioventicular node
For most of us, at rest our heart beats between 60 and 80 beats per minute. During exercise that can increase to as many as 200 beats per minute.
HEART
is the term for contraction. Occurs when the ventricles contract, closing the av valves and opening the sl valves to pump blood into two major vessels leaving the heart.
systole
the term for relaxation. Occurs when the ventricles relax, allowing the back pressure of the blood to closed sl valves and opening av valves.
diastole