Structure of the Heart (recite)

Auricles

"flaps" on the atria to increase the volume of the chamber

Pulmonary Trunk

A large artery that branches into the pulmonary arteries & carries blood to the lungs.

serous fluid

A small volume of _____ separates the epicardium and parietal pericardium.

Interventricular Septum

A thick wall that separates the right and left ventricles

coronary sinus

Blood flowing through most coronary veins empties into this blood vessel

Coronary Arteries (right and left)

Blood vessels that supply the muscle of the heart.

papillary muscles

Cone-like projections on the ventricular walls, to which the chordae tendineae are attached.

epicardium

Covers outer surface of heart

Pulmonary Veins

Deliver oxygen rich blood from the lungs to the left atrium

fossa ovalis

During fetal life, the ________ is open.

Ascending Aorta

First section of the aorta. Starts from the left ventricle of the heart and extends to the arch (bend) of the aorta. The right and left coronary arteries that supply blood to the heart muscle arise from this.

chordae tendineae

Tendon-like chords that are attached to capillary muscles in the heart wall found only in the tri/bicuspid valves; keeps tension on valves so they dont turn inside-out when closed

great cardiac vein

The anterior vein of the heart that runs in the interventricular sulcus, and feeds into the coronary sinus at its left end

Posterior Interventricular sulcus

The groove between the ventricles on the posterior of the heart

(Atrioventricular sulcus) Coronary sulcus

The groove separating atrial and ventricular portions of heart

Interatrial Septum

The wall between the right and left atria

Pulmonary Arteries

Vessels that carry deoxygenated blood out of the right ventricle and into the lungs

Anterior Interventricular sulcus

What is the name of the groove between the two ventricles on the anterior surface of the heart?

arteries

blood vessels that carry blood away from the heart

veins

blood vessels that carry blood back to the heart. All veins, with the exception of the pulmonary veins, carry blood containing carbon dioxide and other waste products. The pulmonary veins carry oxygenated blood from the lungs to the heart.

endocardium

inner lining of the heart wall

aorta

largest artery in the body, originating at the left ventricle and descending through the thorax and abdomen

venae cavae

largest veins in the body. The inferior vena cava carries blood to the heart from body parts below the diaphragm, and the superior vena cava returns the blood to the heart from the upper part of the body.

anterior interventricular artery

left coronary artery - anterior surface of both ventricles and septum

mitral valve (left atrioventricular or Bicuspid valve)

located between the left atrium and left ventricle

tricuspid valve (right atrioventricular valve)

located between the right atrium and right ventricle

myocardium

middle, thick, muscular layer of the heart wall (thicker on LEFT side)

heart

muscular cone-shaped organ the size of a fist, located behind the sternum (breast bone) and between the lungs. The pumping action of the heart circulates blood throughout the body. The heart consists of two upper chambers, the right atrium and the left atrium (pl. atria), and two lower chambers, the right ventricle and the left ventricle (pl. ventricles). The atria receive blood returning from the body through the veins. The ventricles pump blood through the arteries from the heart back to the body tissue. The atrial septum separates the atria and the ventricular septum separates the ventricles. The tricuspid and mitral valves are referred to as the atrioventricular (AV) valves. Valves of the heart keep the blood flowing in one direction.

Trabeculae Carneae

muscular ridges that roughens the inner walls of ventricles

Pectinate Muscles

prominent muscular ridges along the inner surface of the auricle and across the adjacent anterior atrial wall

semilunar valves

pulmonary and aortic valves located between the right ventricle and the pulmonary artery and between the left ventricle and the aorta

posterior interventricular artery

right coronary artery - covers left and right ventricles

circumflex artery

supplies the left atrium and ventricle

Ligamentum Arteriosum

this used to be a connection between the pulmonary trunk and the aortic arch, to by pass the lungs during the time in the fetus. In adults it is reduced to this form.

pericardium

two-layer sac consisting of an external fibrous and an internal serous layer. The serous layer secretes a fluid that facilitates movement of the heart. This layer also covers the heart and is called the epicardium.

middle cardiac vein

vein that drains the area supplied by the posterior interventricular artery