The heart has two halves because one half pumps oxygen and the other carbon dioxide.
Et voilà!
1/2 is oxygenated.
A sheep heart has four chambers.
Sheep in the Big City - 2000 Be Still My Bleating Heart 1-2 was released on: USA: 17 November 2000
Because blood comes in one half and goes out the other. Each half of the heart has a lung pumping oxygen to it.
Septum
There are 2 valves in a sheep's heart. They are the mitral and tricuspid valve. The sheep also has a 4 chamber heart that is very similar to a human heart.
2 ÷ 1/2 = 2 x 2/1 = 4 Alternatively: 1 whole is 2 halves → 2 wholes = 2 x 2 halves = 4 halves.
And the ventricle.
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.
five halves = two and a half = 5/2 = 2 1-2 = 2 1/2
7
The 2 halves in a circle are the 2 semi circles.