Who coinded the name form paper/ bamboo tube to hear heart beat?

Before inventing stethoscope, how they hear heart beat?

Doctors used to hear heart beat by keeping ear on the chest later on used paper tubes and later Bamboo stick What is the apparatus and who discovered id?

I am always the companian of doctor. Doctors can hear the heart beat with my help. Who am I?

Make a paper tube 10 inch long and one inch in diameter. Keep once end of it on the chest of your friend on a pointer one inch to the lift side centre around 6 inches below from his/her neck. Keep your ear at the other end. Listen carefully and count the heart beats for a minute. What is the relationship between the heart beat and the pulse.

You heared a rhythmic sound from your heart after running. That means you know that your heart is beating. Then how will your pulse be?

Decide whether mean or mode is a better representative value in the, following situations. i) A shopkeeper, who sells tooth paste tubes of different sizes, wants to decide which size is to be ordered more. ii) An invigilator wants to bring sufficient number of additional papers to the examination hall. iii) Preparation of the number of laddus for a marriage. iv) For finding the favorite cricketer in a class.

The organ of a person has been damaged completely due to a poisonous waste material B has started accumulation in his blood making it dirty. In order to save this persons life the blood from an artery in the person s arm is made to flow Into Iong tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G H and I in similar proportions to those in normal blood As the person s blood passes through long tubes of substance E most of the wastes present in it go into solution The clean blood is then put back into a I In the person for circulation .Name the wastes substance B

The organ 'A' of a person has been damaged completely due to a poisonous waste material 'B' has started accumulation in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to Dow into long tubes made of substance 'E' which are kept in coiled form in a tank containing solution 'F'. This solution contains three materials 'G', 'H' and 'I' and similar proportions to those in normal blood. As the person's blood passes through-long tubes of substance 'E', most of the wastes present in it go into solution 'F'. The clean blood is then put back into a vein in the person for circulation. Name the waste substance B.

The organ ‘A’ of a person has been damaged completely due to a poisonous waste material "B' has started accumulation in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to flow into long tubes made of substance 'E'which are kept in coiled form in a tank containing solution "F". This solution contains three materials 'G', 'H' and 'l' similar proportions to those in normal blood. As the person's blood passes through long tubes of substance 'E', most if the wastes present in it go into solution 'F'. The clean blood is then put back into a vein in the person for circulation Name the wastes substance B.

There is a pair of bean-shaped organs 'P' in the human body towards the back, just above the waist. A waste product 'Q' formed by the decomposition of unused proteins in liver is brought into organ 'P' through blood by an artery 'R'. The numerous tiny. filters 'S' present in organ 'P' clean the dirty blood goes into circulation through a vein 'T'. The waste substance 'Q' other waste salts and excess water form a yellowish liquid 'U' which goes from organ 'P' into a bag like structure 'V' through two tubes 'W' and 'X'. This liquid is then thrown out of the body through a tube 'X'. Name (i) liquid U (ii) structure V (iii) tube W (iv) tube X.