Question

The most important muscular structure in respiratory system of rabbit is
A. External intercostal muscles
B. Internal intercostal muscles
C. Diaphragm
D. Vertebral column

Answer 1

A muscular structure plays a vital role in the breathing process and serves the function of the respiration muscles and looks like a dome-shaped sheet of muscles. The abdominal cavity, heart, and lungs that are separated by the thoracic cavity and volume of the thoracic cavity increase with the contracting diaphragm and help to draw the air into the lungs.

Complete answer: In the diaphragm three main origins are the sternal parts, the costal part, and the lumbar part. The External part found in the two’ fleshly slips from the back of the xiphoid process. And in the coastal part, the inner surface arises from the cartilages and 6th rib present on each adjacent side. In the lumbocostal arch, fascia is covering the upper part of the quadratus lumborum and attached to the transverse process of the vertebra on the front side. In humans, expulsive acts, such as coughing, sneezing, vomiting, laughing and crying, or flatten the diaphragm. The vertical diameter for the thorax is the main action of the diaphragm. Elastic recoil of lung tissues or lying down, abdominal pushes are the main factors that affect the position of the diaphragm.
Therefore the correct option is (C).

Note: The more lateral and upper external internal intercostal and parasternal portion of the internal intercostal muscles are the primary inspiration muscles present in the diaphragm. Ribs in which the parasternal and intercostal muscles present in the main musculoskeletal of the rabbit respiration system. The rib cage of the rabbit cage expands during the diaphragm contract in the lower part of the abdomen.