Muscles are <u>repaired </u>and built back up throughout life with new muscle tissue.
Answer:
Nutrient-rich blood flows into the liver from the intestines through the hepatic portal vein.
I’m pretty sure it’s the permBain era
A DNA mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes. DNA mutations can affect an offspring can result in abnormal protein products. Mutations can also introduce new alleles into a population of organisms and increase the population's genetic variation.
