Resuscitation (CPR) In , James Elam and Peter Safar were the first to use mouth to mouth resuscitation . CPR is a life saving procedure that is done at the time of emergency conditions such as when a person’s breath or heart beat has stopped abruptly in case of drowning, electric shock or heart attack. CPR includes rescue of breath, which is achieved by mouth to mouth breathing, to deliver oxygen to the victim’s lungs by external chest compressions which helps to circulate blood to the vital organs. CPR must be performed within to minutes after cessation of breath to prevent brain damage or death.
Along with CPR, defibrillation is also done. Defibrillation means a brief electric shock is given to the heart to recover the function of the heart. Varicose veins The veins are so dilated that the valves prevent back flow of blood. The veins lose their elasticity and become congested.
Common sites are legs, rectal-anal regions (haemorrhoids), the oesophagus and the spermatic cord. Embolism is the obstruction of the blood vessel by abnormal mass of materials such as fragment of the blood clot, bone fragment or an air bubble. Embolus may lodge in the lungs, coronary artery or liver and leads to death. Aneurysm The weakened regions of the wall of the artery or veins bulges to form a balloon like sac.
Unruptured aneurysm may exert pressure on the adjacent tissues or may burst causing massive haemorrhage. XI Std Biology-Zoology Chapter- XI Std Biology-Zoology Chapter-