The countercurrent heat exchanger that prevents arterial blood from overheating the testes is the pampiniform plexus of veins. The pampiniform plexus helps to regulate testicular temperature, allowing sperm maturation. It surrounds the testicular arteries and works as a countercurrent heat-exchanger system to cool the arterial blood before entering the testes. This is because the sperms can not develop if the testis is at body temperature.
Answer:
Brittle stars eat decaying plant matter (they are detrivores) and plankton, but can also kill small animals to eat as well.
Explanation:
They do this by pushing their stomach out through their mouth, like most starfish. Hope this helps.
Cutting the circulation from your body can stop the flow of blood
In the case of the gene that determines high cholesterol in the blood, the two alleles express incomplete dominance.
What this means is that the dominant allele is not completely dominant over the recessive allele. If the allele was completely dominant, even one allele would be enough to determine the individual's trait as dominant. But in the case of incomplete dominance between the alleles, the heterozygous individuals that have one dominant and one recessive allele are an ''in between'' phenotype.
<span>An element is a pure substance that cannot be broken down into anything simpler by physical or chemical means.</span>
