The Heart (External Anatomy)

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The Heart
– uses arteries to deliver blood to cells and tissues and veins to receive it back
– pumps to lungs where blood is oxygenated and receives blood back from lungs after oxygenation has taken place
– about size of fist, it is a hollow cone-shaped organ with its apex at the bottom (rests on diaphragm)

Superior Vena Cava
(A1)
main blood vessels returning blood to heart

Inferior Vena Cava
(A2)
main blood vessels returning blood to heart

Right Auricle
(B)
– where superior and inferior vena cava (A1-2) join
– is a flaplike extension of the atrium, which is the receiving chamber of the heart, seen as flat structure because it contains no blood

Right Ventricle
(C)
– after passing through right auricle (B) and accumulating in right atrium, the blood passes through here
– less muscular than the two ventricles

Pulmonary Trunk
(D)
– blood exists right ventricle (C) and enters here
– divides left and right pulmonary arteries (D-E)

Left Pulmonary Artery
(E)
leads to left lung

Right Pulmonary Artery
(F)
leads to right lung, where CO2 leaves the blood and oxygen enters

Pulmonary Veins
(G)
blood returns here from lungs

Left Auricle
(H)
blood passes here from pulmonary veins (G)

Left Ventricle
(I)
an extension of the left auricle (H), blood passes through here

Aorta
(J)
– when heart contracts, left ventricle (I) pumps blood out through here
– strongest and largest body artery

Arch of the Aorta
(J1)
numerous blood vessels arise at the neck, head, and right limb

Coronary Sulcus
(K)
indicates border between ventricles and atria

Anterior Venticular Sulcus
(L)
where right and left ventricles meet

Posterior Venticular Sulcus
(M)
much fat stored here

Right Coronary Artery
(N1)
– found in coronary sulcus
– carries blood to right atrium and portions of both ventricles

Left Coronary Artery
(N2)
carries blood to the wall of left ventricle

Marginal Branches
(O)
extend across the wall of right ventricle

Circumflex Branch
(Q)
moves near the pulmonary trunk and descends long heart’s anterior surface within the septum

Great Cardiac Vein
(R)
carries blood from appex of heart within anterior ventricular sulcus

Middle Cardiac Vein
(S)

Coronary Sinus
(T)
– large vein found within coronary sulcus at posterior portion of heart
– accumulates blood and returns into the right atrium for reticulation of the body

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Arch of the aorta Ascending aorta WE WILL WRITE A CUSTOM ESSAY SAMPLE ON ANY TOPIC SPECIFICALLY FOR YOU …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Arch of the aorta Ascending aorta WE WILL WRITE A CUSTOM ESSAY SAMPLE ON ANY TOPIC SPECIFICALLY FOR YOU …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Pericardial sac a conical sac of fibrous tissue which surrounds the heart and the roots of the great blood …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Aorta major artery leading from left ventricle Aortic Semilunar Valve prevents blood backflow from aorta to left ventricle WE …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Superior Vena Cava large vein. Sends blood to the right atrium. Bottom of right side. Inferior Vena Cava carries …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy The 2 receiving chambers for blood are the right and left atriums The 2 discharging chambers for blood are …

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