Muscle tissue is a necessity for movement of organisms today. According to
Harrison, it is used for transportation, the storing and moving of substances within the
body, heat production, and the maintenance of posture. It is made up of three main
components: Epimysium, Perimycium, and Endomycium. The epimysium is the fibrous
connective tissue on the outer most layer of a muscle. The perimycium divides the larger
sections into smaller groups. These are also known as fascicles. The job of the
endomycium is to cover single cells, but within the cells lay more structures (Harrison).
There are long cylinders that run the long way through a cell called myofibrils.
There can be anywhere from one hundred to several thousands of myofibrils in a muscle
cell. The myofibrils contain myofilaments, which hold protein for energy to contract. The
thick myofibrils have myosin, while the thinner ones have actin, troponin, and
The groups Chondricthyes, Osteicthyes, Sarcopterygians, and Actinoptygerians
are all classifications of fish. In general, they have one thing in common, a hard,
somewhat cartilaginous skeleton, have a jaw, have scales, and are predatory. Brown
states that the Chondricthyes are more cartilage-like than the others, while Osteichthys on
the other hand, are more boney. Actinopterygians have fins that are strong because of an
endoskeletal support. Sarcopterygians have massive fins supported by bone also, but
there is muscle built on the fin to make it appear as massive as it is (Reisz).
According to Leady, proteomics is defined as the study of proteins (2005, p. 21).
The tree that was given to us supports the relation of fish through proteins. By having to
choose from different branches, we were ensured of the differences in protein bands
among the fish. The following list of fish is I predicted to be most related to least related