Essay On Electrical Activity

Electrical activity

Also, one of the important factors is heart requires electrical signals which sent to the heart muscles to sense when to muscle should contract or relax. This is important it needed for the heart to continue pumping. Electrical signals occur in the right atrium of the heart and the signal crosses the atria which makes the contraction and so the blood can pump through the valves from the atrium to the ventricles. Cardiac muscle is myogenic which means the contraction is done within the muscle. Electrical activity may possibly spread from the SAN over the atrial walls and this causes atria to contract. However, the electrical signals can not pass through the septum because septum is non-conductive and so it cannot cross into ventricles. Waves are also passed through the cells called the-atria-ventricular node. Then AVN passes the wave of electrical activity through the fibres which are conductive, and they called bundles. This is done so the ventricle can contract upwards. Non-conductive fibres in the septum are also important because they make delay between both atrial and ventricular contraction. This is done for the ventricle to conduct with blood completely.

M2

First, Circulatory system contains heart, blood vessels and blood. Its main to transport useful

Clotting mechanism is there to protect the body from blood loss which could possibly occur when the person injured. So, the function of clots to prevent extreme flow of blood. Immune cells consist of T cells which are one of the type of lymphocyte and its role in cell-mediated immunity. And another type of the lymphocyte which is B cell which engulf pathogens and they are used to produce antibodies to destroy or trap the bacteria and viruses in the body. So, B cell is plasma cell that store