Fetal Pig Dissection Introduction: Today, we begin a new chapter in ...
Fetal Pig Dissection Introduction: Today, we begin a new chapter in ...
Fetal Pig Dissection Introduction: Today, we begin a new chapter in ...
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v. ____ Coronary artery: (P<strong>in</strong>k) Artery runn<strong>in</strong>g diagonally down theventral side of the pig’s heart from its upper left to its lo<strong>we</strong>r right.Separates the two ventricles.vi. ____ Left atrium (auricle): Dark red flap on the upper part of theheart ly<strong>in</strong>g over the left ventricle. It receives oxygenated bloodfrom the lungs and is emptied <strong>in</strong>to the left ventricle.vii. ____ Right atrium (auricle): Over the right ventricle. It receivesdeoxygenated blood from the body and is emptied <strong>in</strong>to the rightventricle.B. Blood vessels attached to the hearti. ____ Pulmonary artery: Large, hard, white tube lead<strong>in</strong>g out of theright ventricle, ly<strong>in</strong>g bet<strong>we</strong>en the two atria. This branches <strong>in</strong>to aleft and right branch, one for each lung.ii. ____ Aorta: Large, hard, white tube whose base is covered by thepulmonary artery. It leads out of the left ventricle, arches throughthe branches of the pulmonary, and turns posteriorly to head downthrough the thoracic and abdom<strong>in</strong>al cavities.iii. ____ Aortic arch: Curved part of the aorta that comes out of theheart. Note that two arteries branch from the (top) of the arch tosend blood to the head and upper body.iv. ____ Ductus arteriosus: This is a special structure found only <strong>in</strong>the fetus; it short circuits the usual flow of blodd to the lungs bysend<strong>in</strong>g blood from the pulmonary artery directly <strong>in</strong>to the aorta.To f<strong>in</strong>d it, follow the pulmonary artery up from the heart <strong>in</strong>to itsleft branch. There you will see a short connection to the aorta.This closes after birth, when the lungs <strong>beg<strong>in</strong></strong> to function.v. ____ Anterior vena cava: Also called the pre-cava, this is the largevessel enter<strong>in</strong>g the right atrium.vi. ____ Posterior vena cava: Also called the post-cava. Lift the heartup towards the head of your pig. The postcava runs from theabdom<strong>in</strong>al cavity, through the diaphragm <strong>in</strong>to the right atrium.