VII.
_THE CARE OF HEALTH._
Importance of some knowledge of the body and its needs--Fearful
responsibility of entering upon domestic duties in ignorance--The
fundamental vital principle--Cell-life--Wonders of the microscope
--Cell-multiplication--Constant interplay of decay and growth necessary
to life--The red and white cells of the blood--Secreting and converting
power--The nervous system--The brain and the nerves--Structural
arrangement and functions--The ganglionic system--The nervous
fluid--Necessity of properly apportioned exercise to nerves of sensation
and of motion--Evils of excessive or insufficient exercise--Equal
development of the whole.
VIII.
_DOMESTIC EXERCISE._
Connection of muscles and nerves--Microscopic cellular muscular
fibre--Its mode of action--Dependence on the nerves of voluntary and
involuntary motion--How exercise of muscles quickens circulation of
the blood which maintains all the processes of life--Dependence of
equilibrium upon proper muscular activity--Importance of securing
exercise that will interest the mind.
IX.
_HEALTHFUL FOOD._
Apportionment of elements in food: carbon, nitrogen, phosphorus,
calcium, iron, silicon, etc.
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