External intercostals. Internal intercostals. External abdominal oblique. Internal abdominal oblique Transversus abdominis Rectus abdominis. Diaphragm. Internal intercostals. External abdominal oblique. Internal abdominal oblique Transversus abdominis Rectus abdominis. â  Figure 16.14 The muscles involved in breathing. The principal muscles of inspiration are shown on the left, and those of expiration are shown on the right.
Definition: An Arrhenius base is a substance that when added to water increases the number of OH-ions in the water.Arrhenius bases follow the reaction:efinition: An Arrhenius base is a substance that when added to water increases the number of OH-ions in the water.
For instance, methanol, CH3OH, has an OH, but the OH is preceded by CH3, which is not a metal, so this is not an Arrhenius base. Here are some examples of Arrhenius bases (the hydroxide ion is preceded by metals). There are substances that are classified as bases, but they are not Arrhenius bases.