Being sensible I'm not quoting that picture on to the next phase.
Today, where a definition of the moment of death is required, doctors, coroners and the law (at least over here) turn to "brain death" or "biological death" to define a person as being clinically dead; people are considered dead when the electrical activity in their brain ceases.
The end of electrical activity indicates the end of consciousness. However, suspension of consciousness must be permanent. In this state however some patients maintain the ability to sustain circulation and respiration, control temperature, excrete wastes, heal wounds and fight infections but all hope of recovering human thought and personality is then gone.
Seeing as this is widely regard as the "end of life" for human beings. We can also consider the start of life as the start of a recognizable Electroencephalography(EEG) pattern from the fetus.
This is usually twenty four to twenty seven weeks after conception.
So when consciousness ceases, a living organism can be said to have died. The flaw in this approach, however, is that there are many organisms which are alive but not conscious. (for example, single-celled organisms).
Therefore most scientist refer to the term 'brain-dead' when they declare a conscious organism dead. And when considering non-conscious organisms death is considered as the permanent cessation of all biological functions that sustain an organism.
I don't considering the mass of cells you posted as human life, it's alive (despite the fact that it can't sustain itself outside the womb) but it's not conscious.