Sexual reproduction is a process in which gametes (male and female) are exchanged for the generation of one or more individuals of the same species. Individuals born of this reproduction are similar to their parents, but not identical to any of them.
The advantages of this type of reproduction is mainly the genetic diversity of individuals that ensures more secreted genes in future generations. Even organisms that make asexual reproduction also rely on sexual reproduction at some point in their existence. This, however, does not apply to one hundred percent of asexual reproduction organisms.
The answer is that it means that the oxygen would be difficult to carry throughout the body, which happens that ATP would be lacking. Because to create energy there’s a need for respiration and it requires an oxygen. Also, other body systems will slow down because anaerobic respiration doesn't create enough ATP for the entire body.
