Eid mubarak from biology student

Cardially.
Happy Eid day from the depth of right & left ventricles,
wrapped with the ribbons of purkinje fibers and sealed in pericardium.
Decorated with SA and AV nodes with a glitter topping of pericardial fluid
and cusps of mitral and tricuspid valves.

In short ap ko teh-e-dil se EID MUBARAK ho :)