<span>Cardiac muscle are striated and branched; found only in the heart; involuntary; singulated (one cell receives a signal to contract, all neighboring cells are stimulated and contract together to produce a heart beat)
</span>skeletal muscle contains nerve endings; is a voluntary muscle; striped/striated, multi-nucleated (has many nuclei); attached to the bones of the skeleton
The density of water increases as the salinity increases. The density of seawater (salinity greater than 24.7) increases as temperature decreases at all temperatures above the freezing point. The density of seawater is increased by increasing pressure.