Redundant Human Engineering

Redundancy in design is a pivotal concept in engineering. It becomes infinitely more important when designed structures have the potential to take human life. These consciously built-in redundancies (fail-safes) by engineers provide a means to stave off total disaster and potential loss of life. Likewise, the human body has many interwoven fail-safes to prevent death. Integrating redundancies into a design is a testament to intelligence, as it requires conscious forethought and design knowledge as to what may go wrong in the system. This foresight allows entwined processes to kick in when the primary mechanism fails. Additionally, those who reject intelligent design have proposed various design flaws in the human body. Are there any truths in these claims?

Can there be design with no designer?