The brain of a vertebrate is the most complex organ of its body.

Goals of making more complex organs such as the heart, liver, and kidneys are just some of few.

The brain is one of the largest and most complex organs in the human body.

This is, in part, because the skin itself is a complex organ made up of multiple cell types.

First, for an organ so complex, the human brain has a remarkable ability to compensate for certain interference.

The process cannot grow complex organs like hearts.

The brain is too complex an organ; it's impossible to be sure it would respond the same way again.

The human eye is a complex organ made up of about 80 percent water.

The most complex organ that he has tackled, he says, is the uterus.

The eye is one of the most delicate and complex organs in the body.