The circulatory system is often seen to comprise both the cardiovascular system, which distributes blood, and the lymphatic system, which circulates lymph. These are two separate systems.The passage of lymph for example takes a lot longer than that of blood.he open circulatory system is a system in which a fluid in a cavity called the hemocoel bathes the organs directly with oxygen and nutrients and there is no distinction between blood and interstitial fluid; this combined fluid is called hemolymph or haemolymph.
Transcription is the synthesis of an mRNA molecule using a DNA molecule for a template. That mRNA molecule then goes on to complete translation in the ribosome. Translation is â¦ the process in which proteins are produced based on instructions carried by mRNA.
Report Abuse. Transcription factors are protein complexes that help RNA polymerase bind to DNA. RNA polymerase is the enzyme that transcribes genes to make messenger RNA, which is then used to make protein.By controlling RNA polymerase's access to the gene, transcription factors control the rate at which a gene is transcribed.Without transcription factors, cells would not be able to effectively regulate the rate at which genes are expressed.hat is the function of transcription factors in eukaryotic cells? A. They control the expression of certain genes. B. They bend the DNA to bring it close to the operator.