Feel free to ask if you still don't understand
 
        
        
        
The nutrients get to the cells in a flatworms solid acoelomate body by diffusion process. Flatworms feed primarily on protozoa and bacteria, smaller worms and tiny organisms, dead or alive, that they come across. Based on the species of the flatworms , they also consume plant materials. They rely on diffusion to transport oxygen and nutrients to their internal tissues.
        
             
        
        
        
<span>The migration routes of Homo sapiens reveal
that they went through many environmental and physical challenges but adapted
everything much quickly in comparison to the other animals. The evolution
allowed other species also to adopt these changes but it took them a long time
to fit in the new environment, a sub species of a species adopted the new and
the previous one could not, but Homo sapiens invented ways and tools to combat
and evolve much quickly. It included their living, dietary needs, clothing and
much more.</span>
 
        
             
        
        
        
<span>Dehydration is detected by osmorectors in the (hypothalamus)</span>
        
             
        
        
        
  Her  body compensate  for  imbalance    by Kidney retain  bicarbonate  ions  .An  increase  in  hydrogen  ion  in  the body  causes  the  kidney  excrete more  acid.These  lowers  the  PH  of  the  blood  since  hydrogen ion  are  increased  while  bicarbonate  ion  are  decreased