My heart is composed of cardiac muscle tissue
or myocardium
My heart is composed of four chambers too
The left atrium
and
the right atrium
which receive the blood from my heart
The left ventricle
and
the right ventricle
which pump blood out of my heart
The blood from my heart flows
From the systemic veins
into the right atrium
Thence to the right ventricle
from which it is pumped to the lungs
Then returned into the left atrium
thence to the left ventricle
from which it is driven into the systemic arteries
This is the basic circulatory pathway
of the blood from my heart
My heart is composed of
valves
chambers
and associated vessels
but apart from keeping me alive
I really don't have any use for it now
since it's broken