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.
Types of smooth muscles-. Single unit(most of the smooth muscles are of this type) Multi-unit eg-Ciliary muscles. 8.Both types of muscles contain actin and myosin filaments,but in Skeletal muscles,Actin:Mysoin=2:1,while for smooth muscles,Actin:Mysoin=10:1. Actin and Myosin are muscle filaments which contract or relax,causing the whole muscle to perform the desired action.