What is the function of myosepta?
Myosepta have been hypothesized to function as transmitters of muscular forces to axial structures during swimming, but the difficulty of studying these delicate complex structures has precluded a more complete understanding of myoseptal mechanics.
What are Myomeres in fish?
Myomere are the blocks of skeletal muscle tissue found commonly in chordates. The myomeres are separated from adjacent myomere by connective tissues and most easily seen in larval fishes or in the olm.
What is the horizontal septum?
The well-known ‘W’-shaped myosepta of fishes are divided into an epaxial and hypaxial part by a horizontal sheet of connective tissue, the horizontal septum (HS) which is generally regarded as standard part of their segmented musculature (e.g. Liem et al., 2001).
What is the relationship of Myotomes and Myocommata?
Instead, fish has muscle cells running in parallel and connected to sheaths of connective tissue (myocommata), which are anchored to the skeleton and the skin. The bundles of parallel muscle cells are called myotomes (Figure 3.3).
What are Myotomes in fish?
The muscles of fish are layered, rather than bundled as in the other vertebrates. Each segment, or sheet, of muscles is called a myomere or myotome and is separated from its neighbor by a sheet of connective tissue. And horizontally separating the muscles of the upper and lower halves of the body.
What is the function of the myomeres?
There are three distinct types of myomeres: amphioxine, cyclostomine and piscine. All have in common the function of bending their possessors’ bodies from side to side to provide locomotor force. In all cases pull is applied obliquely to the long axis of the body.
What is the function of myomeres in sharks?
The muscles revealed by skinning the side of the shark are arranged in W-shaped bundles called myomeres. The myomeres are separated from one another by connective tissue. Contractions of the myomeres produce the side to side motion of the body that propels the shark foward.
What is the difference between Myocommata and myotomes?
Instead, fish has muscle cells running in parallel and connected to sheaths of connective tissue (myocommata), which are anchored to the skeleton and the skin. The bundles of parallel muscle cells are called myotomes (Figure 3.3). As in mammals, the muscle tissue of fish is composed of striated muscle.
What are myotomes?
The anatomical term myotome refers to the muscles served by a spinal nerve root. A myotome is, therefore, a set of muscles innervated by a specific, single spinal nerve. The term is also used in embryology to describe that part of the somite which develops into the muscles. Each vertebrae has a spinal nerve.