First he pollinated  short pea plants with tall pea plants. T â¦ he next generation of pea  plants resulting from the expiriment were all tall pea plants. He  bred two of the pea plants from thhe new generation and they ended  up having 3 tall pea plants and 1 short pea plant.
Intercostal muscles are several groups of muscles that run between the ribs, and help form and move the chest wall. The intercostal muscles are mainly involved in the mechanical aspect of breathing.These muscles help expand and shrink the size of the chest cavity to facilitate breathing. External intercostal muscles aid in quiet and forced inhalation. 2  They originate on ribs 1-11 and have their insertion on ribs 2-12. 3  The external intercostals are responsible for the elevation of the ribs and bending them more open, thus expanding the transverse dimensions of the thoracic cavity.
The external intercostal muscles consist of 11 muscles that envelop each side of the exterior of the rib cage from the back of the ribs and wrapping around where they are attached to the sternum in front.he intercostal muscles expand and compress the rib cage to allow your body to breath. The intercostal muscles are those muscle bands that surround the ribs. Intercostal muscles respond to the contraction of the diaphragm.