Block 4 - Heart Anatomy Flashcards by Lorin Uttinger

Q

Fibrous sac surrounding the heart

A

Pericardium

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Q

A

Mediastiunum

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Q

Venous blood returns to the heart via the ____ & IVC and drains into the right atrium

A

Superior vena cava

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Q

A

Aorta

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Q

posterior to pulmonary trunk

A

4 pulmonary Veins

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Q

After blood enters the ____ ____ it flows into the right ventricle

most medial

A

Right atrium

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Q

Blood leaves the right ventricle and enters the

most anterior

A

Right ventricle

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Q

leaves right ventricle carrying deoxygenated blood
high pressure system

A

Pulmonary trunk

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Q

return oxygenated blood to left atrium
low pressure system

posterior to pulmonary trunk

A

4 pulmonary veins

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Q

Receives oxygenated blood from the
lungs via the pulmonary veins

most posterior

A

Left atrium

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Q

A

Left ventricle

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Q

Blood leaves the heart via ____ to profuse the rest of the body

A

Aorta

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Q

The heart is profused by two main arteries that branch off the aorta

A

Right Coronary A.
Left Coronary A.

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Q

emerges from the right side of the aorta
between the right atrium and right ventricle

Anterior aspect of heart

A

Right coronary A.

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Q

arises from the left side of the aorta, passes posterior to the pulmonary trunk

A

Left coronary A.

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Q

Branch of right coronary artery

A

Posterior interventricular A.

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Q

Branch of Left coronary A.
Circumflex artery supplies the left atrium and the left posterior ventricle

A

Left circumflex branch of left coronary artery

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Q

Branch of Left coronary artery
“Widowmaker”*

A

Left anterior interventricular A.

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Q

Three main cardiac veins drains into the ______ ______

Posterior aspect of heart

A

Coronary sinus

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Q

The blood from the coronary sinus empties into which chamber of the heart?

A

Right atrium

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Q

The ____ cardiac vein empties blood into the coronary sinus

A

Middle cardiac V.

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Q

____ cardiac vein runs along the side of the right coronary artery and drains into the coronary sinus

A

Small cardiac V.

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Q

Posterior aspect

A

Right coronary A.

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Q

A

Great cardiac V.

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Delivers venous (deoxygenated) blood to coronary sinus | Travels lateral to posterior

Great cardiac V.

Identify what side of the heart is shown

Anterior surface of heart

Identify what side of the heart is shown

Posterior surface of heart

These two vessels **empty** venous **(deoxygenated) blood** **into** the **right atrium**

1. SVC 2. IVC

Identify the chamber

Right atrium

first electrical stimulus

Sinoatrial (SA) node

Inferior to the SA node within right atrium

Fossa Ovalis

Inferior to fossa ovalis within right atrium

Opening of coronary sinus

Parallel muscular ridges in the walls of the atria of the heart

Pectinate mm

Muscular ridge that separates smooth from rough portions of chamber

Crista terminalis

* Largest of the four heart valves * Blood from right atrium through this valve to right ventricle

Tricuspid valve

| Posterior aspect of heart inferior to tricuspid valve

Right ventricle

Trabeculae carneae

Papillary mm

fine strands of **connective tissue attaching** the **papillary muscles** to the inferior surface of the rough zone of the leaflets

Chordae tendineae

| Anterior aspect

Right ventricle

prevents regurgitation of blood back into the right ventricle

Pulmonary (semilunar) valve

leaves right ventricle **carrying deoxygenated** blood

Pulmonary trunk

Blood enters pulmonary trunk and enters these two vessels

1) Left pulmonary A. 2) Right pulmonary A.

Identify valves

4 Pulmonary V.

Left atrium

Located in left atrium

Opening to left auricle

In front of root of aorta

Left auricle

* assists in preventing mitral regurgitation during systole * Blood from LA travels through to LV

Mitral (bicuspid) valve

Notice the thickness of the walls

Left ventricle

Identify the valve within the aorta

Aortic (semilunar) valve

vale closes preventing blood flow back into the ventricle...and blood under low pressure also enters the coronary arteries

Aortic (semilunar) valve

* **delays the electrical activity** for a few hundredths of a second **before allowing it to pass into the ventricles ** * allows proper systole of the atria

AV node

Superior Vena Cava

Aorta

Pulmonary trunk

Aortic arch

* Vessel off aorta * Gives rise to *R. common carotid and R. subclavian artery*

Brachiocephalic Atery/Trunk

Right Subclavian A.

Right Common Carotid A.

Vessel off aorta

Left Common Carotid A.

Vessel off aorta

Left Subclavian A.

Trachea

Right Brachiocephalic V.

Left Brachiocephalic V.

Ascending Aorta

No function in adults but important in infants

Ligamentum Arteriosum

Left ventricle

Right ventricle

Right marginal A.

Right auricle

Inferior vena cava

Inferior vena cava

The **superior vena cava** is positioned ____ to the ascending aorta

lateral (right)

The **descending (thoracic) aorta** passes ____ to the left main bronchus

posterior

The **descending (thoracic) aorta** is positioned ____ to the pericardial sac

posterior

The **descending (thoracic) aorta** is positioned to the ____ of the vertebral column

left (lateral)

The **inferior vena cava** is positioned to the ____ of the descending aorta

right

The **inferior vena cava** passes ____ to the liver and is positioned ____ to the caudate lobe

posterior lateral