Em condições normais e encontrando-se desperta, uma pessoa pode parar de respirar quando desejar fazê-lo. A pessoa não seria capaz de produzir anóxia total (completa ausência de oxigênio) simplesmente parando de respirar porque

answer; the above answer to the above statement is (true)

a- all cells come from pre-existing cells

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

i think its white blood cells

i hope this