I'm sure it's true since before doing a science experiment/If you're trying to figure something out, you need a Hypothesis.
Aluminium, an adjuvant.
MF59 (squalene oil), an adjuvant.
Thiomersal, also called Thimerosal.
The first heart chamber that the dye would enter is right atrium.
This will be followed by
left ventricle
right ventricle
left atrium
coronary valve
I would recommend to move the slide away from the end of the viewing part of the microscope, so that if the lab partner were to adjust too much, that the viewing part of the microscope wouldn’t collide and passively crack the slide.