KERALA PSC / CDPO / BIOLOGY / HEART / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

 

KERALA PSC / CDPO / BIOLOGY / HEART / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

KERALA PSC / CDPO / BIOLOGY / HEART / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY

·      The cardiovascular system comprises the heart, veins, arteries and capillaries

·      Heart is the pumping organ of blood vascular system

·      Heart length: 12 cm

·      Heart width: 9cm

·      The normal heart beat is 70-72 per minute in males and 78-82 per minute in females

·      The heartbeat of a child is more than that of an adult ie, 140/min

·      The circulation of blood in the body is regulated by the heart

·      The human heart is on the left side beneath the left nipple

·      The pericardium protects heart from harm

·      The average weight of the heart is about 340gm in men and 225gm in women

·      The human heart has four chambers, a pair of auricles and a pair of ventricles

·      The human heart consists of four chambers and in fish the heart consists of two chambers. In those of amphibians there are 3 chambers. Heart of reptiles is incompletely divided into 4 chambers (Crocodile has 4 chambered heart). Mammals and birds also have four chambered hearts.

·      The deoxygenated blood (impure blood) from the body coined by two large veins called Superior Venacava and Inferior Venacava is in the right auricle.

·      The oxygenated blood from the lungs is received by the heart in left auricle.

·      Aorta is the largest artery which carries oxygenated blood

·      The largest blood vessel in the body is Aorta

·      As blood passes through lungs, gases are exchanged through blood vessels called capillaries of alveoli. Heart beat rate in embryo (Foetus) 1 minute = 200. Heart beat rate in new born baby 1 minute = 140 times.

·      Normal pulse rate of healthy adult human is 72 per minute

·      Normal BP is 120/80mmHg

·      The science dealing with the study of the heart and its diseases is known as Cardiology

·      ECG (Electro Cardio Gram) is the photographic record of electric variations that occur during contraction of muscles of heart.

·      ECG was invented by Wilhelm Einthoven

·      Arteries carry pure blood from the heart to the tissues

·      Pulmonary artery is the only artery carrying impure blood

·      Veins collect impure blood from the tissues and carry it to the heart

·      Pulmonary vein is the only vein carrying pure blood

·      The largest vein in human body is called inferior venacava

·      The length of our blood capillaries is about 100000cm

·      Jarvik Heart is the artificial pump to replace the human heart developed by Robert K Jarvik

·      John H Gibbon (USA) built the first successful heart – lung machine

·      A pacemaker is used to stimulate the heart muscles

·      Except heart all other organs of our body are found in pairs

·      The organ which is not affected by tumour is heart

·      Pain in heart muscles: Angina pectoris

·      The circulation of blood in the body is regulated by the heart

·      The credit of discovering the circulatory system goes to William Harvey

·      The total length of our blood vessels is about one lakh kilometer

KERALA PSC / CDPO / BIOLOGY / HEART / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE / KERALA PSC PRELIMINARY