These 10 facts about space will blow your mind. A correspondence course is an academic class that is taken â and taught â across some geographical distance. The original correspondence courses were carried out through the postal service. Professors would mail assignments and lecture notes to students, who would return essays and projects for grading.
A voluntary muscle, often called a skeletal muscle, is one of three types of muscle in the body. Most voluntary muscles are used to move bones, though some, such as the muscles in the face, are used to create movements below the skin. Unlike cardiac or smooth muscle, these muscles can be controlled by the conscious mind.
Skeletal muscles are striated and are the muscles that are in voluntary control. These include biceps(arm), pectoralis major(chest) and other muscles that you can move. These muscles are striated and has many nuclei. Smooth muscles are not striated and are the muscles that are not in voluntary control. These include organs and blood vessels, excluding heart. These muscles are unstriated with one nucleus. Smooth muscles has only one nucleus.