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.
compare the difference in lengths of the resting length and the length of myosin filaments for smooth vs. skeletal muscle. - resting length of smooth muscle is much shorter than skeletal. - smooth myosin filaments are much longer compared to skeletal.