If a male patient presents with a broken rib, he may have difficulty breathing. Select all of the ways that a breakdown in the skeletal system has impacted the respiratory system.
1) The skeletal system provides calcium as an important oxygen transporter in the blood.
2) The skeletal system provides magnesium as an important carbon dioxide transporter in the blood.
3) The axial skeleton protects the thorax.
4) The muscles for breathing attach to the ribs.
