Which bodily systems, calibrated for $1g$, are specifically cited as variables needing consideration for Martian-born children due to low gravity?
The formation of the inner ear, the development of the skeletal structure, and the establishment of circulatory systems
The profound shift from Earth's $1g$ to Mars' partial gravity environment introduces major variables into developmental biology. Specifically concerning is how this reduced force affects complex, gravity-dependent structures. The text highlights three critical areas: the delicate formation of the inner ear, the necessary development of robust skeletal structure, and the establishment of circulatory systems that are calibrated for $1g$. Furthermore, there is concern regarding whether a child developed entirely in low-g would possess cardiovascular systems or skeletal density robust enough to potentially handle the slightly higher Martian gravity or, critically, a future return to Earth's full gravitational load.
