Heart Pumping Organ


 
 
Concept Explanation
 

Heart Pumping Organ

 Human heart is a muscular, cone shaped , hollow dark red colour organ about the size of fist .It  plays the role of pump in the circulatory system. Heart is situated behind the sternum, between the lungs in the thoracic cavity. The heart is slightly tilted towards the left. In man heart weighs 0.43 % of the body weight . 

The heart is covered in the tough inflexible membrane called as pericardium. Between heart and the pericardium their is present pericardial fluid which help to reduce friction between the heart wall and surrounding tissue. The heart is made up of special types of muscles called as  myocardium. The inner lining of heart is called as endothecium.

Internal Structure  of Human Heart :

  •  Human heart consists of basically four chambers. The upper chamber are called the auricle or the atrium and the lower two chamber are called the ventricles.
  •  The two auricles are separated from each other by interauricular septum  and the two ventricles are separated by interventricular septum.
  • The ventricle have more muscular wall than the auricles. The right auricle opens into the right ventricle . This opening is guarded by a tricupsid valve.
  •  The left auricle opens into the right ventricle which is guarded by a bicupsid valve. Both these valve prevent the back flow of the blood to the auricle during pumping action.
  •  Heart  consists of different types of vessels like :-

  • Superior vena cava : It brings blood from the body parts superior to the heart,
  •  Inferior vena cava: It brings blood from the parts of the body inferior to the heart ,
  • Pulmonary artery : It carries blood to the lungs for oxygenation.
  • Coronary sinus : It drain blood from the vessels supplying the walls of the heart.
  • Aorta: It takes blood away from the heart to all other body parts except the air sacs of the lungs. 
  • Pulmonary vein  It brings oxygenated blood to the heart fro the lungs.
  • Working of Heart :-

  •  The right atrium receives the deoxygenated blood from all the body parts through veins like  superior vena cava   and  inferior vena cava.
  •  When the right atrium is full of blood and it contracts , the tricupsid valves open under the pressure and the blood is delivered to the right ventricle . This valve help in preventing back flow of the blood.
  •  When right ventricle is full of blood and the ventricle contracts , the blood is  pumped into the pulmonary artery which carries the blood to the lungs for oxygenation.
  •  At the junction of right ventricle and pulmonary artery their is present a semilunar valve which prevents the back flow blood.
  •  The oxygenated blood from the lungs though pulmonary vein enters the left atrium , which contracts and transport the blood to the left ventricle with opening of bicupsid valve.
  •  On the contraction of left ventricle the oxygenated blood is pumped into the aorta which is also guarded by the valve  and get transffered to  the different parts of the body.
  •                               

     

     

    Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    The main function of the heart is to pump __________________  and keep it moving in the blood vessels.

               

    Right Option : A
    View Explanation
    Explanation
    Question : 2

    How many chambers does the heart have _________________ .

    Right Option : B
    View Explanation
    Explanation
    Question : 3

    Which of the following are correct ?

    (a) Heart is the pumping organ of our respiratory system.

    (b) The heart is located, slightly towards the left, in the chest. It is a muscular organ roughly of the size of the closed fist of the person.

    (c) The heart is divided into two equal halves - left half and right half. Each half is further divided into two chambers which have a common opening between them. There are, thus, four chambers in all.

     

    Right Option : B
    View Explanation
    Explanation
    Chapters
    Pre-Historic Period
    Indus Valley Civilization
    Vedic Civilization
    Religious Reform Movement
    The Early Kingdoms
    The Mauryan Empire
    Post Mauryan Period
    The Age Of The Guptas
    Post Gupta Era
    Age of Rajput
    Khilji Dynasty
    Slave Dynasty
    Tughlaq and Sayyid Dynasty
    Vijaynagar Empire And Bahamani Kingdom
    Mughal Empire And Beyond
    Lodhi Dynasty
    Cholas, Chalukyas and Pallavas
    Arab Invasions
    Bhakti and Sufi Movement
    Rise of Sikhs, Jats and Marathas
    Administrative Structure of Delhi Sultanate
    Architecture During Medivial India
    Advent Of The Europeans
    Post Mughal Period
    Rise of New States in 18th Century
    Growth of British Paramountacy
    Socio Religious Reforms
    Constitutional Development of India
    Indian Struggle Against British Rule
    The Revolt Of 1857
    Education Under British Rule
    Role of Press in Freedom Struggle
    First Phase of National Movement
    Second Phase of National Movement
    Third Phase of National Movement
    Constitutional Development in India
    Constituent Assembly
    Union And Its Territory
    Structure of Indian Constitution
    Fundamental Rights and Duties
    The Union Executive
    The Union Legislature
    Constitutional Amendments and Provisions
    Judiciary In India
    Emergency Provisions
    Center - State Relations
    The State Executive
    The State Legislature
    Election Commission Of India
    Constitutional Organisation
    Non-Constitutional Organisation
    Local Self Goverment
    India - Size And Location
    Geological History Of India
    The Physical Features Of India
    Climate Of India
    Soils In India
    Natural Vegetation
    Windlife Conservation In India
    Drainage System of India
    Irrigation System Of India
    Agriculture In India
    Livestock And Fisheries In India
    Minerals And Energy Resources In India
    Means Of Transport In India
    Major Industries In India
    Tribes of India
    Census of India 2011
    Music
    Dance
    Theatre
    Pantings
    Art, Architecture & Culture of India
    Bio-Diversity
    Earth And Its Structure
    Land Rock And Soil
    Atmosphere, Climate And Weather
    Oceanography
    Human And Regional Geography
    Economic Growth And Development
    Sectors Of Indian Economy
    Economic Planning Of India
    Fiscal And Monetary Policy In India
    Infrastructure In India
    Effects Of British Rule On Indian Economy
    National Income
    Banking System In India
    Poverty And Unemployment
    Inflation And Trade Cycles
    Major Institutions
    Environmental Studies
    Tissues In Organism
    Cytology
    Classifucation Of Plants
    Structural Composition Of Plants
    Nutrition In Plants, Harmones And Plant Disease
    Ecosystem
    Classification In Animals
    Nutrition In Animals
    Human Digestive System
    Human Respiratory System
    Human Skeleton System
    Human Excretory System
    Human Nervous System
    Human Circulatory System
    Human Endocrine System
    Human Reproductive System
    Genetics
    Human Diseases
    States Of Matter
    Metals And Non Metals
    Acid Bases And Salts
    Periodic Classification
    Fuel, Combustion And Flame
    Environmental Chemistry
    Rest And Motion
    Work Power And Energy
    Gravitation
    Pressure And Its Effects
    Simple Harmonic Motion
    Sound and Waves
    Heat And Temperature
    Light - Reflection
    Electricity And Magnetism
    Modern Physics
    Force And The Laws Of Motion
    Light - Refraction
    Dispersion And Human Eye
    Magnetic Effect Of Electric Current
    Atom And Molecule
    Chemistry In Everyday Life
    Units And Dimensions
    Content / Category
    Class / Course
     
     
    Related Videos
    Language - English
    Language - English


    Students / Parents Reviews [20]