Similarities And Differences Between The Cardiac And Skeletal Muscle

The cardiac muscles are the muscle of the heart itself. The cardiac muscle is the tissue that makes

The similarities between the right and left sides of the heart are that both sides contain one atria and one ventricle and are both made up of strong cardiac muscle. They each also have strong cardiac muscles with the left side of the heart being thicker than the right to give it the ability to push the blood throughout the circulatory system

23. This is a network of specialized cardiac muscle fibers that provide a path for each cycle

The Myocardium is made up of specialised cardiac muscle, only found in the heart and is not under voluntary control.

There are three main types of muscle tissue in the body: Skeletal muscle, smooth muscle and cardiac muscle. Firstly, skeletal muscle has a stripped appearance when it is examined under a microscope so it is sometimes known as striated/stripped muscle. Skeletal muscle is voluntary and this means that it is under conscious control. Secondly, there is smooth muscle which is an involuntary muscle that operates without any conscious control. This muscle is controlled by the nervous system. Smooth muscle can be found in the blood vessels and the walls of the digestive system and it helps to control digestion and blood pressure. Lastly, there is cardiac muscle which is located in in the wall of the heart. Cardiac muscle is involuntary and this means that it is not under conscious control. This is made up of a specialised type of tissue which is striated and it has its own blood supply. The contractions aid the pumping of blood through the blood vessels

These muscle tissue cells specialised to contract and move parts of the body. It is also capable of responding to stimuli. There are three types of muscle in the body such as: skeletal, cardiac and smooth. Each muscle is created of muscle fibers that are capable of contracting and returning back to original state-relaxation. Contraction causes movement of the skeleton, soft tissue, blood or specific material. Skeletal muscle is attached to the bones of the skeleton. Some facial muscles are attached to the skin. They have direct control over them through nervous impulses from our brain sending messages to the muscle. Contractions can vary to produce fast, powerful movements. These muscles also have the ability to stretch and contract to return to original shape. Cardiac muscles are found in the chambers of the heart such as the atria and ventricles. It is under the control of the automatic nervous system; however, even without nervous input contractions can occur. It is completely different to all the other muscles. Smooth muscles are also known as involuntary due to our inability to control its movement. This muscle is usually found in the walls of hollow organs

2. Discuss the anatomical differences between frog and human hearts. The frog heart has a single ventricle and two atria.

Smooth muscles are found in the skin, internal organs, reproductive system, major blood vessels, and excretory system. Skeletal muscles are composed of long fibers surrounded by a membranous sheath, the sarcolemma. Since the Skeletal muscles are under control by whom ever they belong to are called voluntary muscles. This muscle is attached to two or more bones which are then attached to the skeleton by tendons. For example, head and neck muscles; contraction of these muscles produces facial expressions and head movements. They are also responsible for speech and swallowing. Skeletal muscles are the main muscles which move your body. Muscles nearly always work in coordinated groups; contraction of one muscle is accompanied by relaxation of another, while other muscles stabilize nearby joints. Then the last of the muscle types is the Cardiac Muscle or the involuntary muscles. Cardiac muscles are not under conscious control they do not react by a persons decision or movement. and are connected to the nervous system which are stimulated by autonomic impulses. Cardiac muscles are found in your internal organs like the heart or the intestine. For example; they include muscles that propel food through the intestine and those that control sweating and blood pressure.

Cardiomyocytes have a tremendous amount of mitochondria present inside the cell compared to many other cells, this gives the cardiomyocyte the ability to be highly resistant to fatigue. Whereas skeletal muscle cells can fatigue much easier.

As the name implies, cardiac muscle tissue is only found in the heart. It pumps blood through the heart’s chambers and into the blood vessels.

The skeletal muscle pump is a number of skeletal muscles which help the heart by circulating blood. The skeletal muscle pump plays an important role in the increase of venous returning back to the heart. It starts to work when contractions apply pressure against the vein. The valves that is proximal to the region where the contractions have occurred are pushed open which allows the blood to drive back into the heart. The other valves which is located near the distal region of contraction are sealed by the blood that is back flowing. The vessels that it operates on are called the arterioles, their function is to regulate the blood flow into different tissues. These vessels then branch into the capillaries which is the tinniest blood vessels in the human body. It is different because each time that the heart pumps it pushes the blood

Skeletal muscles contain cells called muscle fibres with the help of nerves, carries messages to and fro the brain. This therefore enables the muscles to contract when messages from the brain travel along the nerves to the fibre, either telling them to shorten, or tense. The fibres are made up of contractile protein myofibrils in which, each myofibril is made of overlapping protein threads called myofilaments. Every single muscle fibre is a long cylindrical cell encased by a sarcolemma, the cell membrane surrounding a muscle fibre. It is specifically designed for contraction. Muscles work across joints in which one end is attached to the fixed bone and the other, to the moveable bone. Movement would therefore occur when the muscle contracts,

6. Automaticity – ability of heart to beat spontaneously and repetitively without external neurohormonal control. The heart is capable of beating outside the body, given proper laboratory conditions. Automaticity is evidently linked to fluid and electrolyte balance rather than to nervous system control.

While contraction in skeletal muscle is triggered by motor neurons under central control, certain cardiac muscle variants exhibit autorhythmicity. This means that that they are capable of producing their own depolarizing electrical potential. The cardiomyocytes that are capable of producing their own electrical potentials are found in what is referred to as the electrical condition system of the heart. This system is comprised of specializes cardiomyocytes that are autorhythmic and are able to conduct electrical potentials rapidly. These specialized structures include the sinoatrial node, atrioventricular node and bundle, and Purkinje fibers.

Cardiac muscle is so named because it is found in the heart. Cells are joined to one another by intercalated discs which allow the synchronization of the heart beat. Cardiac muscle is branched, striated muscle.