Heart Lab 3 ULM

What are the functions of the heart?

Generating blood pressure, routing blood, ensuring one-way blood flow, and regulating blood supply

Describe the fibers of the cardiac muscles.

Branched and striated

Cardiac muscle has how many nuclei/nucleus

One

Are cardiac muscles voluntary or involuntary?

involuntary

What is contained within the intercalated disks of cardiac muscle?

Desmosomes and gap junctions

What are the functions of desmosomes and gap junctions?

Hold cells together and allow for communication between cells respectively

The heart is about the size of what?

A closed fist

Where is the heart located?

The mediastinum within the pericardial cavity

What is the membrane layer that lines the pericardial cavity?

Parietal Pericardium

What is the name of the membrane that lines the heart?

Visceral pericardium/ epicardium

Give the blood flow of the heart from start to finish. (refer to flashcard set named blood flow)

Starts in the inferior and superior vena cava —> right atrium—>tricuspid valve—>pulmonary semilunar valve—>pulmonary trunk—>right and left pulmonary arteries—>lungs (pulmonary circulation)—>right and left pulmonary vein—>left atria—>bicuspid valve—>left ventricle—>aortic semilunar valve—>aorta—>body tissues (systemic circulation)

Ascending Aorta

Aortic Arch

Apex

Auricles

Descending Aorta

Epicardium

Pulmonary Semilunar Valve

Right Atrium

Superior Vena Cava

Tricuspid Atrioventricular Valve

Pulmonary Trunk

Myocardium

Right Coronary Artery

Aortic Arch

Coronary Sinus

Inferior Vena Cava

Bicuspid (mitral) atrioventricular valve

Pulmonary Valve

Left Atrium

Left Coronary Artery

Aortic Arch

Aortic Semilunar Valve

Pulmonary Trunk

Aorta

Endocardium

Right Atrium

Inferior Vena Cava

Pulmonary Trunk

Superior Vena Cava

Bicuspid (mitral) atrioventricular valve

Pulmonary Semilunar Valve

Myocardium

Epicardium

Superior Vena Cava

Aorta

Tricuspid Atrioventricular Valve

Aortic Semilunar Valve

Left Coronary Artery

Pulmonary Trunk

Right Coronary Artery

Superior Vena Cava

Purkinje Fibers

Chordae Tendinea

Papillary Muscle

Right and Left Bundle Branches

Ligamentum Arteriosum (remnant of ductus arteriosum)

Sinoatrial Node

Interventricular Septum

Pectinate Muscle

AV Bundle (Bundle of His)

Interventricular Septum

Chordae Tendinea

Atrioventricular Node

Fossa Ovalis (Remnant of foramen ovale)

Trabeculae Carneae

Papillary Muscle

Atrioventricular Node

Interventricular Septum

Sinoatrial Node

Ligamentum Arteriosum