Heart surface topography

Size of a closed fist

About 1% of the body weight

How large is a dog heart

In the middle mediastinum between the lungs within the thoracic cavity

Approximately 3rd-6th ribs

Enclosed by the pericardium (heart sac)

Situated in closed space called pericardial cavity

Where is the heart located in the body

Forms a 45 degree angle with the sternum

Lies just slightly to the left of the midline

Ovoid or cone shaped

Base of heart points craniodorsally

Apex points caudoventrally (left ventricle)

What is the orientation of the heart in the body

Auricular surface

The left side of the heart is known as the ___ surface

Left side

The auricular surface refers to the ___ side of the heart

Atrial surface

The right side of the heart is known as the ___ surface

Right side

The atrial surface refers to the ___ side of the heart

Paraconal interventricular groove

Superficial separation of the left and right ventricles on the left side of the heart

Superficial separation of the left and right ventricles on the left side of the heart

What is the paraconal interventricular groove

Subsinuosal interventricular groove

Superficial separation of the left and right ventricles on the right side of the heart

Superficial separation of the left and right ventricles on the right side of the heart

What is the subsinuosal interventricular groove

Coronary groove

Superficial separation of the atria and ventricles

Superficial separation of the atria and ventricles

What is the coronary groove

Epicardium

Myocardium

Endocardium

What are the layers of the heart wall

Epicardium

Visceral serous pericardium

What are the 2 synonymous terms for the outermost layer of the heart

Left ventricle is 3-4 times thicker than right ventricle

What are the differences in myocardial thickness between the left and right ventricles