The primary job of muscle is to move the bones of the skeleton, but muscles also enable the heart to beat and constitute the walls of other important hollow organs. There are three types of muscle tissue: This type of muscle creates movement in the body. When the nervous system signals the muscle to contract, groups of muscles work together to move the skeleton.
There are three types of muscle tissue: Visceral, cardiac, and skeletal. Visceral Muscle Visceral muscle is found inside of organs like the stomachintestines, and blood vessels. The weakest of all muscle tissues, visceral muscle makes organs contract to move substances through the organ.
Because visceral muscle is controlled by the unconscious part of the brain, it is known as involuntary muscle—it cannot be directly controlled by the conscious mind.
This smooth appearance starkly contrasts with the banded appearance of cardiac and skeletal muscles. Cardiac Muscle Found only in the heartcardiac muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle.
While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural pacemaker of the heart is made of cardiac muscle tissue that stimulates other cardiac muscle cells to contract.
Because of its self-stimulation, cardiac muscle is considered to be autorhythmic or intrinsically controlled. The cells of cardiac muscle tissue are striated—that is, they appear to have light and dark stripes when viewed under a light microscope.
The arrangement of protein fibers inside of the cells causes these light and dark bands. Striations indicate that a muscle cell is very strong, unlike visceral muscles.
The cells of cardiac muscle are branched X or Y shaped cells tightly connected together by special junctions called intercalated disks. Intercalated disks are made up of fingerlike projections from two neighboring cells that interlock and provide a strong bond between the cells.
The branched structure and intercalated disks allow the muscle cells to resist high blood pressures and the strain of pumping blood throughout a lifetime. These features also help to spread electrochemical signals quickly from cell to cell so that the heart can beat as a unit.
Skeletal Muscle Skeletal muscle is the only voluntary muscle tissue in the human body—it is controlled consciously. Every physical action that a person consciously performs e. The function of skeletal muscle is to contract to move parts of the body closer to the bone that the muscle is attached to.
Most skeletal muscles are attached to two bones across a joint, so the muscle serves to move parts of those bones closer to each other.Did you know you have more than muscles in your body? They do everything from pumping blood throughout your body to helping you lift your heavy backpack.
You control some of your muscles, while others — like your heart — do their jobs without you thinking about them at all.
Muscles are all. The muscular system is an organ system consisting of skeletal, smooth and cardiac torosgazete.com permits movement of the body, maintains posture, and circulates blood throughout the body.
The muscular system in vertebrates is controlled through the nervous system, although some muscles (such as the cardiac muscle) can be completely torosgazete.comer with the skeletal system it forms the. A. J. G. Muscles to fingers. Muscular System Tour Lab page 4 The Muscles a front view.
Deltoid. The Muscles a back view.
If you want to know more about your beautiful bones, this movie is a great place to start! Muscular system is the system of Human Body that provides motor power for all movements of body parts. Muscular system is composed of special tissue called muscular tissue. Anatomy Arcade makes basic human anatomy come ALIVE through awesome free flash games and interactives.
H. F. Use your front view and back view.
The Muscular System. The branches of science that will help you understand the body parts and functions are anatomy and physiology.
Anatomy deals with the study of the human body (the component parts, structure and position) and physiology the study of how the body functions. Anatomy Arcade makes basic human anatomy come ALIVE through awesome free flash games and interactives.
The muscular system is responsible for the movement of the human body. Attached to the bones of the skeletal system are about named muscles that make up roughly half of a person’s body weight.