Circulatory System Facts and Functions

by | Mar 13, 2020 | Health | 0 comments

heart and circulatory system
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Adult organism has about 4,7-5,6 Liters of blood.

Circulatory System

Circulatory System is a wide organ and blood vessel network that provides cell supply with blood, nutrients, hormones and other gaseous substances.

Majority of us think that circulatory system (cardiovascular system) is just a path for blood to circulate. However, it comprises three different systems:

  • Heart (Cardiovascular system)
  • Lungs (Pulmonary system)
  • Blood Vessels (arteries, veins, capillaries)

An average human body moves 7572 liters of blood and in distance it is 96 560 kilometres.

Adult body has about 4,7 – 5,6 liters of blood. And it comprises:

  • Plasma
  • White  Blood Cells (Leukocytes or Lymphocytes)
  • Platelets (Thrombocytes)

Circulatory System moves lymph – transparent fluid, which removes any unwanted substance.

Cardiovascular System consists of:

  • Heart
  • Blood
  • Blood Vessels

It includes Pulmonary Circulation (circle through the lungs), where blood gets saturated with oxygen, and a little blood vessel system, that supplies whole body with oxygen.

Pulmonary blood circulation system, where oxygen is less than carbon dioxide, gets directed to lungs, and then returns to heart.

After the blood has delivered oxygen to organism where it is necessary, it goes to the right atrium of the heart and through three-way valve further to right chamber.

From their blood through crescent valve gets pumped to artery, along which it’s directed to lungs.

When blood gets into lungs, they are separated from carbon dioxide, they intake oxygen and get pumped back in the heart.

Circulatory System comprises:

  • Veins
  • Arteries
  • Capillaries

That transports blood to the heart, takes care of cells and re-transfers blood back to the heart.

Healthy heart contractions have 5 phases.

  1. Pause / Diastole -Heart muscle is relaxed
  2. Atrial Contraction
  3. Ventricular Contraction
  4. Heart chambers continue to contract, after all the blood has been pumped out
  5. Contractions Ends

Cycle Repeats.

Did You know that for blood to circulate through entire body it takes about one minute?

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Circulatory System Diseases

Heart and Circulatory System diseases are the major cause of death in USA.

One of the most common diseases is atherosclerosis – it is caused by fat deposition in arteries, because residue causes artery walls to become inflexible and thicker.

Accumulated substances delays blood delivery and in more serious cases blocks it, causing stroke or heart attack.

Stroke are caused when blood vessels are being blocked, that supplies brain with the blood.

It is also second most common circulatory system disease. Risk factors are:

  1. Smoking

  2. Diabetes

  3. High Cholesterol Levels

Another disease is – Hypertension, also known as high blood pressure. In this situation heart works with higher load and the result is – heart attack, stroke or renal failure.

Aortic Aneurysm occurs when aorta is damaged and it swells and breaking apart – causing serious internal bleeding.

Aneurysm can be hereditary defect or it can occur during the lifetime, if an individual is suffering from atherosclerosis if it has extra weight, high blood pressure or mix of these.

Peripheral Artery disease is diagnosed, performing non-invasive testing, for example, ultrasound, computer tomography or magnetic resonance examination.

Ultrasound are the cheapest examination tool, however they are ineffective. For example, Computer Tomography or Magnetic Resonance shows much more anatomic detail.

Ultrasound can’t specify Constriction or Blocade. However, chronic venous insufficiency can be determined, because ultrasound examination shows back-flow and can determine necessary treatment methods.

“Heart Facts”

  • Heart is in the size of a big fist
  • The Heart weights 280-340 g for Males and 225-280 g for Females
  • Heart beats 100 000 times a day
  • Heart pumps around 5,7 liters of blood through body
  • Newborn heartbeat rate is faster than adults , about 80-180 times in one minute

 National Heart Foundation

Most Important Facts In Circulatory Research

  • 16.th century B.C – Ebers papyrus are created, document which explains one of most ancient known circulatory system description.

  • 6.th century B.C – Ancient Indian ayurveda therapist Susruta writes medicinical treatise about body vital fluid circulation in organism.

  • 2.nd century Ancient Greek doctor Galen documentates that, what is known about bloodflow in blood vessels, describes venous (dark blood) and atherous (lighter and more liquid) blood and notes, that hey have different functions.

  • 1628.Year English doctor William Harvey is the first person to describe blood flow.

  • 1706. Year French anatomy professor Reimon de Vignan for the first time describes heart room and blood vessel structure.

  • 1816.Year French doctor Rene Laenek invents stethoscope.

  • 1902.Year American doctor James B. Heirik for the first time documentates blood vessel calcification caused heart disease.

  • 1903.Year Dutch doctor Willem Einthoven invents electrocardiograph.

  • 1952.Year American surgeon F.John Louis performs first successful heart surgery with chest opening.

  • 1967.Year South African surgeon Christian Barnard performs first full heart transplantation from another human.

  • 1982.Year American doctor Robert Jarvik constructs first artificial heart, and american surgeon Willem Devrick inplants it.

  • 2018.Year Google performs 300 000 patient retina scanning, to instruct artificial intellect (AI) to recognize heart diseases.

7 Interesting Facts About Circulatory System Organs Functions And Disorders

  • Blood Vessel Length Is Thousands Of Kilometers. If We could measure adult human arteries, veins and capillaries their total length would be around 100 000 kilometers. 80% of length would make capillaries (small blood vessels). Earth total girt is 40 000 kilometers. So We could girth Earth 2,5 times with one Human blood vessels!

  • Blood Vessels Deforms Red Blood Cells. Capillaries are very tiny – their diameter is 8 microns / 0,008 millimeters. Red blood cells are about same size, therefore they are directed through capillaries abreast. Some capillaries are even smaller, therefore red blood cells, penetrates them, deforms, practically penetrating them.

  • Bigger The Body, Slower the Heart Rate. In animal life heart rate are proportional to body size. Bigger the animal, the slower heart beats in calm state. Human adult heart beats about 75 times per minute – same speed as adult sheep. For example, blue whale heart is the same size as compact car, and beats only 5 times in minute, However woodcutter heart contracts 1000 times per minute.

  • Heart Doesn’t Require A Body. Heart has ability to keep beating outside of a body. The reason is – heart makes electrical impulses, that makes itself contract. As long as oxygen is delivered to heart, muscle keeps beating, even without being connected with body.

  • Red Blood Cells Are Special. Red blood cells unlike other body cells does not have a core. Since they don’t have big inner structure they have ability to transfer lot more oxygen. However having no core means, that they can’t synthesize and split it make new cell components. Red blood cells circulate inside organism for about 120 days and then dies out, either from age or damage. Furthermore, there is no reason to be worried, bone marrow constantly produces new red blood cells, replacing old ones.

  • Losing Other Half Can “Break Heart”. Condition, what is stress indicated cardiomyopathy, means sudden, heart muscle weakness. Symptoms are  similar to heart attack (pain in heart, short of breath pain in arms). This heart condition can be called “Broken Heart Syndrome” , because it’s cause can be emotional stress, for example, death of someone close, divorce or loved one absence.

  • Human Blood Can Be In Different Colors , But Not Blue! Oxygen saturated blood, that goes through arteries and capillaries are bright red, however when it’s transferred to tissue, it becomes dark red and goes back through veins to heart. Through skin visible blood looks blue, however it doesn’t mean that You have blue blood. It is because light rays have different intensity and wave length – they get inside body get absorbed or reflect, become visible. To veins and back can travel only high energy light (blue) light.

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