The Muscular System

Organ system made of skeletal, smooth, and cardiac muscles.

Types of Tissues in the Muscle System

There are three types of tissues that make up the muscle system - skeletal, cardiac, and smooth/visceral.

Functions of the Muscular System

The muscle system as a whole has many functions. For example, the skeletal muscle is responsible for maintaining posture and body position, and maintain body temperature. The function of the cardiac muscle is to pump blood, continuously, especially as it is the only muscle in the heart (and that is the one place that it is found). The smooth muscle is responsible for filling in the smaller details, like erecting hairs, adjusting pupil size, maintaining blood pressure, and so on and so forth.

Assisting or Accessory Organs/Tissues

There are quite a few assisting/accessory organs when it comes to the muscular system. Like, when it comes to smooth muscle, it lines blood vessels (controls the flow of blood throughout) and organs such as the stomach, esophagus (pushes food along); in fact, many of the digestive and excretory organs are lined with smooth muscle, so one could make the argument that all of those organs help to make up the muscular system. It could also be said that, in the case of skeletal muscle, that the skeletal system also helps to make up the skeletal muscle. And, of course, there is the heart, which is a big part of what cardiac muscle has to work with.

Types of Movements

All muscle movement is due to little things called microfilaments. They have helped skeletal muscle flex and extend the joints of the body, helped smooth muscle push food through the digestive tract, and helped cardiac muscle keep the heart thumping.

Energy Forms Used

You see, energy is stored in the muscles in the form of ATP (Adenosine Triphosphate), which itself comes from the breakdown of glucose that occurs during the process of cellular respiration, which happens in the mitochondria of the cell. And when a muscle is fatigued, it is unable to contract or do its job properly because of a lack of oxygen.

The Definition of Attachment (as it relates to Anatomy/Physiology)

The point or mode of attachment of a skeletal muscle to the bone or other body part that it moves.