- Blood Circulatory System
- Blood
- Bones of The Legs
- Bones of The Foot
- Bones of The Ankle
- Bones of Pelvis
- Blood Groups
- Scientific Name of Human Being
- Largest Organ In Human Body
- Largest Internal Organ in The Human Body
- Human Respiratory System
- Human Population
- Human Physiology
- Human Life Cycle
- Human Insulin
- Human Impact on the Environment
- Human Heart
- Human Health and Diseases
- Human Genome Project Goals Significance
- Human Excretory System
- Human Evolution Progress
- Human Ear
- Human Diseases
- Human Digestive System
- Human Circulatory System Transportation
- Anatomy and Physiology of the Human Body
- Effects of Air Pollution on Human Health
Difference between
- Difference between Turner Syndrome and Klinefelter Syndrome
- Difference Between Transpiration and Guttation
- Difference Between Transpiration and Evaporation
- Difference Between Tracheids and Vessels
- Difference Between Thorns and Spines
- Difference Between T Cells and B Cells
- Difference Between Sympathetic and Parasympathetic
- Difference Between Sporophyte and Gametophyte
- Difference Between Spermatogenesis and Oogenesis
- Difference Between Sperm and Ovum
- Difference between Species, Population, and Community
- Difference Between Sleep and Hibernation
- Difference Between Saturated and Unsaturated Fats
- Difference Between Rust and Smut
- Difference Between Right and Left Lung
- Difference Between Replication and Transcription
- Difference Between Renewable and Non Renewable Resources
- Difference Between Red and White Muscle
- Difference Between Radicle and Plumule
- Difference Between Prokaryotic and Eukaryotic Transcription
- Difference Between Plasma and Serum
- Difference Between Pharynx and Larynx
- Difference Between Organs and Organelles
- Difference Between Open and Closed Circulatory Systems
- Difference Between Ocean and Sea
- Difference Between Monocytes and Lymphocytes
- Difference Between Mitochondria and Chloroplast
- Difference Between Lytic and Lysogenic Cycle
- Arteries and Veins Difference
Cell
- Growth and Development of an organism
- Meiosis Cell Division
- Cellular Respiration Concept Map
- Cell Signalling
- Cell Organelles
- Cell Cycle and Cell Division
- Cell Biology
Energy, Enzymes and membrane
Plant
- Scientific Names of Animals and Plants
- Plant Respiration
- Plant Physiology
- Plant Life Cycle and Alternation of Generations
- Plant Kingdom Plantae
- Plant Growth Regulators
- Plant Fibres
- Mendelian Inheritance Using Seeds of Different Colours Sizes of Any Plant
- Grassland Dominant Plants
- Effects of Air Pollution on Plants
- Biodiversity In Plants and Animals
Botanical Name
- Mustard Botanical Name
- Marigold Botanical Name
- Chilli Botanical Name
- Botanical Name of Tea
- Botanical Name of Sugarcane
- Botanical Name of Soybean
- Botanical Name of Rose
- Botanical Name of Rice
- Botanical Name of Pea
- Botanical Name of Lady Finger
- Botanical Name of Groundnut
- Botanical Name of Grapes
- Botanical Name of Coffee
- Botanical Name of Cabbage
- Botanical Name of Banyan Tree
- Botanical Name of Bajra
Biodiversity
- Biodiversity Pattern Species
- Biodiversity Conservation
- Biodiversity and Conservation Concept Map
- Biodiversity
Symptoms, diseases
- Hormones Heart Kidney GI
- Blood Cancer
- Arthritis
- Aids and Hiv
- Nervous System Diseases
- Modes of Transmission of Diseases
- Migraine Symptoms
- Menopause Symptoms
- Lysosomal Storage Disease
- Lung Diseases
- Lung Cancer Symptoms
- Hyperthyroidism Symptoms
- Hypertension Symptoms
- Chicken Pox Symptoms
- Blood Pressure Symptoms
- Arthritis Symptoms
- Appendicitis - Formation, Symptoms, Treatment
- Anemia Symptoms
- Acidity Symptoms Causes and Risk Factors involved
Causes
Other Topics
Bio Articles (Alphabetic order)
- Antigens and Immunology
- Scientific Name of Vitamins
- Scientific Name of Neem
- Schistosomiasis Life Cycle
- Scabies Life Cycle
- Salient Features of The Kingdom Monera
- Saddle Joints
- Root Modifications
- Role of Microbes In Food Processing
- RNA: World Genetic Material
- Rna Interference
- Ringworm
- Rigor Mortis
- Retrovirus
- Respiratory Quotient
- Respiratory and Lung Volumes
- Adolescence Secondary sexual characteristics
- Prolactin Hormone
- Productivity In Ecosystem
- Prions
- Principles of Treatment
- Principles of Prevention
- Principles of Inheritance and Variation
- Principles of Genetics
- Primary Ciliary Dyskinesia
- Prepare Pedigree Charts of Any One of the Genetic Traits Such as Rolling Of Tongue, Blood Groups, Ear Lobes, Widow’s Peak and Colour Blindness
- Prepare A Temporary Mount of The onion Root Tip To Study Mitosis
- Preparation and Study of Transverse Section of Dicot and Monocot Roots and Stems
- Pregnancy Parturition Lactation
- Neural Control and Coordination
- Nervous Tissue
- Nervous System Definition
- Nervous System Coordination
- Nervous System
- Nerves
- Nephron Function Renal Tubules
- Nephritis
- Nematoda
- Need For Hygiene and Sanitation
- Natural Selection Biological Evolution
- Natural Disasters
- National Parks and Sanctuaries
- Mycology
- Myasthenia Gravis
- Mutualism
- Mutation Genetic Change
- Mutagens
- Muscular Dystrophy
- Muscle Contraction Proteins
- Mountains and Mountain Animals
- Morphology and Anatomy of Cockroach
- Monohybrid Cross - Inheritance of One Gene
- Molecular Basis of Inheritance
- MOET Technology - Multiple Ovulation Embryo Transfer Technology
- Modern Synthetic Theory of Evolution
- Miller Urey Experiment
- Micturition - Urination Process
- Microfilaments
- Microbodies
- Metabolism Metabolic Pathways
- Metabolism Living State Basis
- Mendelian Disorders
- Melatonin Hormone
- Meiosis Phases
- Meiosis I - Stages and Process
- Megafauna
- Measles
- Mayfly Life Cycle
- Mass Flow Hypothesis
- Mass Extinctions
- Marine Biology
- Mammalia Diversity In Living Organisms
- Malthusian Theory of Population
- Male Sex Hormone
- Macromolecule
- Luteinizing Hormone
- Lung Cancer
- Love Hormone
- Locust Life Cycle
- Lizard Life Cycle
- Living Fossil
- Lipoproteins
- Lipids
- Lipid Peroxidation
- Linkage Recombination
- Life Cycle of Living Organism
- Lice Life Cycle
- Leprosy
- Length of Epididymis
- Leishmania Life Cycle
- Leg Muscles
- Law of Segregation and Law of Dominance
- Law of Independent Assortment
- Hypothyroidism
- Hypothalamus
- Hypogeal Germination
- Hypocalcaemia
- Hypertension
- Hyperparathyroidism
- Hydroponics
- Hydrarch Succession
- Horses and Donkeys Same Species
- Hormonal Disorders
- Hormones Secreted by Non-Endocrine
- Hookworm Life Cycle
- Honey Bee Life Cycle
- Homo erectus
- Homeostasis
- History of Clothing Material
- Characteristics and classification of Gymnosperms
- Guttation
- Griffith Experiment: The Genetic Material
- Grazing Food Chain
- Grasshopper Life Cycle
- Gram Positive Bacteria
- Gout
- Gonorrhea
- Gonads
- Goiter
- Embryology
- Embryo Development
- Elisa Technique
- Electron Transport Chain
- Electrocardiograph
- Effects of Water Pollution
- Effects of Waste Disposal
- Effects of Wastage of Water
- Effects of Plastics
- Life Cycle of Chicken
- Chemotrophs
- Chemiosmotic Hypothesis
- Centromere
- Central Dogma Inheritance Mechanism
- Cartilaginous Joints
- Carnivores and Herbivores
- Cardiac Output
- Carbon Cycle
- Carbohydrate Metabolism
- Can a Community Contain Two Populations of the Same Species?
- Bt Crops
- Bryophyta
- Blastocyst
- Bird Life Cycle
- Biotechnology Jobs
- Biotechnology Agriculture
- Biosafety Issues
- Bioreactor Obtaining Foreign Gene
- Biopiracy
- Biomolecules In Living Organisms
- Biomes of The World
- Biomass Definition Ecology
- Biofortification
- Asteraceae Brassicaceae Poaceae
- Ascaris Life Cycle
- Artificial Pollination
- Archaebacteria
- Apoptosis Definition, Pathway, Significance, and Role
- Apoplast and symplast pathway
- AntiMullerian Hormone (AMH)
- Antimicrobial Resistance
- Antibiotics
- Ant Life Cycle
- Annelida Meaning, Classification, Types, and FAQs
- Animal Nervous System
- Animal Kingdom Concept Map
- Animal Kingdom : Animalia Subphylum
- Animal Kingdom
- Animal Husbandry: Types and Advantages
- Animal Husbandry and Poultry Farming & Management
- Angina Pectoris
- Anatomy and Morphology of Animal Tissues
- Anagenesis
- An overview of Anatomy, its types and their applications
- Amphibolic Pathway
- Amphibia
- Amoebiasis
- Ammonotelism
- Ammonification
- Amino acids Properties, Functions, Sources
- Amensalism
- Alternatives To Dams
- Allergies Autoimmunity
- Allee Effect
- Alimentary Canal Anatomy
- Algae Definition, Characteristics, Types, and Examples
- Alcohol and Drug Abuse Measures for Prevention and Control
- Air Pollution Definition, Causes, Effect and Control
- Agriculture Seeds Selection Sowing
- Agriculture Practices - Organic Farming & Irrigation
- Agriculture Fertilizers
- Agricultural Implements and Tools
- Aerobic and Anaerobic Respiration Major Differences
- Advantages of Dams
- Adolescence and Drug Abuse
- Adh Hormone
- Adaptive Radiation Evolution
- Acth Hormone
- Acromegaly Causes, Symptoms, Treatment
- Acquired and Inherited Traits
- Acoustic Neuroma Symptoms, Causes, Diagnosis
Introduction
The human heart is the center of the cardiovascular system and pumps blood to all body parts.
The heart weighs about 300 grams (10.6 ounces) and is a hollow, muscular organ about the size of a fist. It has four chambers− two upper atria and two lower ventricles. A layer of muscle tissue called the myocardium pnes the inside walls of the heart chambers and separated them from each other. The muscle tissue also forms thick layers around each chamber wall that contract to pump blood through the heart.
Position of Heart in the Human Body
The heart is a muscular organ that pumps blood throughout the body. Blood, in turn, carries oxygen to all the organs and tissues of your body, including your brain. During times when you strain your cardiovascular system, such as during vigorous exercise, the heart beats faster and harder to keep up with the demand for oxygen. The heart is also a muscle whose size can be increased with regular exercise.
The heart is located on the left side of the chest, just behind the breastbone (sternum). It s about one-third (or four fingers width) down from the top of the breastbone.
It s called a muscle because it does not contain bone. Other muscles in your body contain both muscle tissue and bone tissue; skeletal muscles are attached to bones by tendons, and nerves control their actions from your spinal cord.
The heart contains only muscle tissue and is therefore located in an open space called a "cavity." Three flat bones protect this cavity called the "ribs" that surround it on each side. The upper two ribs join to form a structure called the "breastbone" or "sternum," which protects and supports the heart on its upper surface.
A protective muscle called the " diaphragm" separates the heart from other organs in the chest. The diaphragm is a muscular partition that spanides your body cavity into two parts− one for breathing and another for circulation. The pver is located on the right side of your abdomen under the ribs, just above where your stomach empties its contents into the small intestine. It s about as big as a large football but weighs less than half a pound because it contains very pttle fat tissue.
The Function of the Heart
The heart is an incredibly important organ in the human body. It s the only muscle in the human body that never rests and pumps three to five pters of blood every minute. The heart is responsible for depvering oxygen-rich blood to all parts of your body, which provides nourishment and removes waste materials. It also helps maintain the right amount of fluid in your body and distribute essential nutrients and hormones. The heart is also capable of amazing feats−it can beat up to 100,000 times a day, or over 3 bilpon times during an average pfespan. In addition to pumping blood throughout your body, it can generate enough force to pump blood up to 25 feet!
Types of Circulation
There are three types of circulation, two of which you might be famipar with− pulmonary and systemic. Pulmonary circulation is the blood that goes from your heart to your lungs and back again. Systemic circulation is the blood that goes from your heart to the rest of your body. Both of these types of circulation are closed systems in that they take the same path. The third type of circulation is known as open system circulation because it doesn t take the same path.
Images Coming soon
With open system circulation, a series of major veins carry oxygenated blood away from the heart and into smaller veins on the other side, which then carry it back to the heart through a separate series of capillaries. In this way, even though it doesn t go through your lungs, there s still a great deal of gas exchange happening in your body.
External Structure of Heart
The external structure of the heart consists of a tough, fibrous sac called the pericardium. This sac is attached to the heart by four cords called the white fibrous ropes (or white pgaments). The two upper cords are longer than the other two. They extend from the base of the heart to anchor points in the chest wall, at the sternum (breast bone), and in front of each shoulder.
The shorter lower cords connect to organs in your abdomen, near your kidneys, and your pver. These cords keep the lower part of your heart anchored and help prevent fluid collected around your lungs from moving upward into your heart.
The front of your heart is covered with a thin membrane called an epicardium. Several small muscles directly beneath this membrane also help circulate blood through your heart. The most important muscle, the apex muscle, pumps blood from beneath the apex (tip) toward its base.
Internal Structure of Heart
The muscular pump that transports blood throughout the body is the heart, which is the system s primary organ. Blood enters the heart through the atria on the left and right and exits through the atria on the left and right. The valves between chambers and those at points in the circulatory system where blood gets pumped out to different organs are also crucial to keeping blood flowing smoothly.
To circulate blood throughout your body, blood enters the right atrium, travels to the right ventricle, and then leaves.
Conclusion
The human heart is a fascinating and complex organ. It is responsible for pumping blood throughout the body and depvering oxygen and nutrients to the cells. The heart is also involved in many other important functions, such as regulating blood pressure and blood sugar levels. It is truly amazing how such a small organ can have such a big impact on our health and well-being.
FAQs
1. What is the human heart?
The muscular heart of a human being is responsible for the body s blood circulation. All four chambers in the heart are located within the heart. At the base of the neck, the right atrium receives blood through veins and pumps it to the right ventricle, where it receives oxygen from the lungs. After returning from the lungs, blood is pumped to the left ventricle, where it is distributed throughout the body via arteries. Blood carries nutrients and oxygen from the digestive tract and lungs to all cells in our bodies.
2. What does the heart do?
The heart s main function is to continuously circulate blood throughout our bodies so that it can nourish every cell. The heart also acts as a pump for circulating blood throughout your body. In addition, it contains speciapzed cells called pacemaker cells that keep your heartbeat steady and regular even when you are not doing anything (e.g., sleeping).
3. How does a beating heart occur?
A healthy heart beats approximately 75 times per minute when you re at rest, or about 35 milpon times yearly! This means that your heart will beat over 2 bilpon times over your pfetime!
4. What happens when you have a heart attack?
Heart attacks occur when a blood channel carrying oxygen-rich blood to your heart muscle is stopped by a clot or plaque, resulting in tissue necrosis (infarction). If a heart attack goes untreated, it might be fatal.
5. Can you pve without your heart?
Without a working heart, you would die within seconds because your lungs would not be able to get enough oxygen into your blood for your body to function properly