Above/cranial
It is superior to the right ventricle Inferior <
Superior
In a sheep heart, the right atrium is located above the right ventricle. The right atrium receives deoxygenated blood from the body and then pumps it into the right ventricle, which then pumps the blood to the lungs for oxygenation.
Blood flow of a sheep's heart is from the right atrium into the right ventricle. Next it goes to the lungs via the pulmonary artery. Lastly, oxygenated blood returns to the left atrium through the pulmonary veins. From the left atrium it goes to the left ventricle and then out to the body via the aorta.
The four valves of the fetal pig and sheep hearts are the tricuspid valve, pulmonary valve, mitral (or bicuspid) valve, and aortic valve. The tricuspid valve is located between the right atrium and right ventricle, while the mitral valve is between the left atrium and left ventricle. The pulmonary valve controls blood flow from the right ventricle to the lungs, and the aortic valve regulates blood flow from the left ventricle to the aorta. These valves ensure unidirectional blood flow through the heart's chambers.
If you look at the back wall of a fetal pig heart, you will see a vessel that is large in size in a sheep compared to the small size of the fetal pig heart. In sheep, the hemiazygous vein develops a connection to the heart through what becomes the superior vena cava.
Moderator band
A cow's heart is much larger than a human's, for good reason. It has to work much harder to pump blood through a large cow's body. However, for the sake of human heart transplants, cow-human hearts are being developed.
If a probe is inserted down the aorta of a sheep, it would come out from the left ventricle of the heart. The aorta is the main artery that carries oxygen-rich blood away from the heart, and it originates from the left ventricle.
The left ventricle is thickest (as it is in all four-chambered mammalian hearts) this is because it is the part of the heart that pumps blood around the whole body and so needs to be able to withstand greater pressure hence the thickness
A sheep heart has four chambers.
The heart of a sheep is bigger than humans and is positioned slightly differently in the body. Also, instead of having pulmonary arteries and veins they have what's called a pulmonary trunk and the top middle of the heart.