Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of vascular tissue, the leaves of ferns and their relatives are better organized than the mosses and liverworts. ..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern of neural activities required to perform a movement. Learn more about this topic in this tutorial. Find out the mechanisms involved in length-monitoring systems, alpha-gamma coactivation, and withdrawal reflex...