Cardiovascular system Part 1 Flashcards
A closed system of the heart and blood vessels. It deliver oxygen and nutrients and to remove carbon dioxide and other waste products
Cardiovascular System
pumps blood
heart
allow blood to circulate to all parts of the body
Blood vessels
The Heart’s location is in the Thorax between the lungs in the inferior ______________
mediastinum
The Heart’s location is in the _______ between the ______ in the inferior mediastinum
Thorax, lungs
The Heart About the size of your
fist
The Heart Orientation is Pointed
_____ directed toward left ____
apex , hip
The Heart Base points toward
right shoulder
a double-walled sac
Pericardium
loose and superficial double-walled sac
Fibrous pericardium
deep to the fibrous pericardium and composed of two layers
Serous membrane
Next to heart; also known as the epicardium
Visceral pericardium
Outside layer that lines the inner surface of the fibrous pericardium
Parietal pericardium
Visceral pericardium is also known as
epicardium
fills the space between the layers of pericardium
Serous fluid
Heart Wall has Three layers
Epicardium
Myocardium
Endocardium
The heart’s Outside layer wall.
This layer is the visceral pericardium
Epicardium
Epicardium is a ___________ tissue layer
Connective tissue layer
The Heart’s wall Middle layer which is
Mostly cardiac muscle
Myocardium
The Inner layer of the Heart’s wall. It is where Endothelium is
Endocardium
Right and left side of the heart act as
separate pumps
There are 4 chambers which are
Right atrium
Left atrium
Right ventricle
Left ventricle
Receiving chambers of the heart
Atria
Discharging chambers of the heart
Ventricles
the free wall of this ventricle is much thicker
Left ventricle
Separates the two ventricles
Interventricular septum
Separates the two atria
Interatrial septum
Allow blood to flow in only one direction to prevent backflow
Valves
There are Four valves of the heart which are
Bicuspid (mitral) valve
Tricuspid valve
Pulmonary semilunar valve
Aortic semilunar valve
valves of the heart between atria and ventricles
Atrioventricular (AV) valves
2 Atrioventricular (AV) valves are
Bicuspid (mitral) valve (left side of heart)
Tricuspid valve (right side of heart)
heart valves between ventricle and artery
Semilunar valves
2 Semilunar valves
Pulmonary semilunar valve
Aortic semilunar valve
Anchored in place by chordae tendineae (“heart strings”). These valves Open during heart relaxation and closed during ventricular contraction
AV valves
AV valves are Anchored in place by “heart strings” or the
chordae tendineae
These valves are Closed during heart relaxation but open during ventricular contraction
Semilunar valves
True/ False
these valves operate opposite of one another to force a one-way path of blood through the heart
True
Blood returning to the atria, puts
pressure against these valves which are forced open
The AV valves
As the ___________ fill, AV valve flaps hang limply into ventricles
ventricles
This part of the heart contracts ,forcing additional blood into ventricles
Atria
This part of the heart contract,
forcing blood against AV valve flaps
Ventricles