Advertisements
Advertisements
Question
Short answer question.
What is the role of papillary muscles and chordae tendinae in the human heart?
Advertisements
Solution
The bicuspid and tricuspid valves are connected to chordae tendineae which in turn are connected to the papillary muscles present on the ventricular wall. Chordae tendineae and papillary muscles regulate the opening and closing of valves.
APPEARS IN
RELATED QUESTIONS
The human body has an organ A which acts as a double pump. The oxygenated blood coming from the lungs through blood vessel B enters the upper left chamber C of the double pump. When chamber C contracts, then blood goes into the lower left chamber D. The contraction of chamber D forces the blood to go into a blood vessel E which supplies oxygenated blood to all the organs of the body (except the lungs). The deoxygenated blood coming out of the body organs is taken by a blood vessel F to the right upper chamber G of the pumping organ. Contraction of chamber G forces the deoxygenated blood into the right lower chamber H. And finally, the contraction of chamber H sends the deoxygenated blood into the lungs through blood vessel I.
- What is organ A?
- Name the blood vessel (i) B (ii) E (iii) F, and (iv) I.
- What are chambers (i) C, and (ii) D?
- What are chambers (i) G and (ii) H?
The diagram given alongside represents the human heart in one phase of its activity. Study the same and then answer the question that follow:

Name the phase.
The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:
Name the parts numbered 1 to 6.

Describe in brief die cardiac cycle.
When are the sounds ‘LUBB’ and ‘DUB’ produced during heartbeat ?
Name the Following
The valve present between the left atrium and the left ventricle.
What is the importance of valves in the heart?
The correct match of blood vessel, its connection and O2 content is ____________.
If a person has a heart attack, what must be done immediately?
P. Loosen his/her clothing
Q. Make him/her lie down in an airy room
R. Rush him/her to the hospital
S. Engage him/her in a conversation
Given below is a diagram of the external features of the human heart. Study the figure and answer the questions that follows:
![]() |
- Label the guidelines shown as 1 to 6 in the figure.
- Write the important role of parts 5 and 6.
- Name the chamber of the heart which collects blood from the lungs through a blood vessel. Also write the name of the blood vessel.
- Write one structural and one functional difference between the blood vessels 4 and 5.
- What happens when there is a blockage in any coronary artery or any of their branches?

