If you are physically fit, you will be able to perform daily tasks with ease, reduce your risk of health complications, and participate in a variety of activities. To be maintain physical fitness you wouldn't be sitting on a couch for long periods of time.
An heterozygote advantage is when a heterozygous genotype has a greater aptitude than homozygous genotypes. The specific case of heterozygous advantage over a single locus is known as overdominance. In short, this happens when a disorder is present in a heterozygous population, but this disorder has a great benefit for the genes present in the body.
Lymphatic tissue can also be found in other areas of the body, such as the skin, stomach, and small intestines. Lymphatic system structures extend throughout most regions of the body. One notable exception is the central nervous system.
