Some of the movements animals make are under conscious control, and are called voluntary movements. By contrast, other movements occur without the animal's conscious decision to do so. These types of movements are called involuntary movements or reflexes.Continue Reading
There are many different examples of voluntary movement. Humans walk, talk and lift things voluntarily. Additionally, humans have conscious control over their excretory functions, making them voluntary movements as well. Voluntary movements of other animals are similar. A flying bird, slithering snake and swimming fish are all exhibiting voluntary movements.
Involuntary movements include a variety of reflexes. For example, the human eyes exhibit several types of involuntary movement, such as the constriction of the pupil in bright light or the expansion of it in dim light. The movement of the heart muscle is involuntary for most animals. Doctors frequently check the involuntary movements of their patients as a component of a physical exam. For example, doctors may hit a patient’s knee with a small, plastic mallet. If the patient is healthy, the knee extends involuntarily, causing the patient’s leg to kick.
Some activities, such as eating food, feature both types of movement. Typically, chewing is a voluntary movement, while the muscular contractions of the esophagus and intestine are not under conscious control.Learn more about Muscles
The muscular system consists of 650 muscles and it supports the movements required to walk, talk, eat and stand. It makes up more than 40 percent of the body’s total weight. The muscular system controls daily functions, maintains posture and circulates blood. It is divided into three types of muscles: skeletal muscles, smooth muscles and cardiac muscles.Full Answer >
While both the pectoralis major and pectoralis minor muscles control the movements of the arm, the pectoralis major is specifically responsible for its lateral, vertical and rotational movement. In addition to this primary function, both pectoral muscles also aid in the action of deep breathing.Full Answer >
The main purpose of the gastrocnemius muscle is to facilitate leg movements, such as jumping, walking, running and knee bending. The gastrocnemius muscle pushes the leg down during these types activities. The location of this muscle is the back of the leg on the calf area.Full Answer >
The skeletal muscles, the muscles that power voluntary movements of the body, aid the circulatory system as the primary method by which deoxygenated blood is pushed back to the heart through the veins. Veins have thin walls compared to arteries and are easily compressed as skeletal muscles contract, forcing blood along the vein. Backflow is prevented by the presence of valves within the veins, a feature arteries largely lack.Full Answer >