Exclusively breastfed babies do not require additional water even when it is very hot outside, as long as baby is allowed to nurse as needed. Even in extremely hot, dry weather your baby can get all the liquids needed via breastmilk.
Smooth muscles contract very slowly, whereas skeletal muscles can contract at different rates. Skeletal muscles can be composed of fast-contracting fibers, slow-contracting fibers or a mixture of both.
Smooth Muscles vs Cardiac Muscles. The two most confusing muscle types are the cardiac muscle and smooth muscle. The reason for such confusionmay be because of both being characterized with involuntary contractions unlike the long and powerful skeletal muscles (somatic muscles) that can contract voluntarily.