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Types Of Blood Cells
Types Of Blood Cells
Published: 2010/05/04
Channel: TutorVista
Red blood cells under the microscope, hypo and hypertonic solutions
Red blood cells under the microscope, hypo and hypertonic solutions
Published: 2016/06/03
Channel: Sci- Inspi
How White Blood Cells Are Formed   YouTube
How White Blood Cells Are Formed YouTube
Published: 2012/11/26
Channel: LIA Belfast
Blood, Part 1 - True Blood: Crash Course A&P #29
Blood, Part 1 - True Blood: Crash Course A&P #29
Published: 2015/08/03
Channel: CrashCourse
A Day in the Life of a Red Blood Cell
A Day in the Life of a Red Blood Cell
Published: 2010/04/18
Channel: Digital Disasters
What is the Ideal White Blood Cell Count?
What is the Ideal White Blood Cell Count?
Published: 2017/06/30
Channel: NutritionFacts.org
Blood cells in Human Eye
Blood cells in Human Eye
Published: 2016/11/10
Channel: Slivki Show
The Components of Blood and Their Importance
The Components of Blood and Their Importance
Published: 2009/01/29
Channel: American Society of Hematology
Exploring the Heart - The Circulatory System!
Exploring the Heart - The Circulatory System!
Published: 2014/02/03
Channel: Aboutkidshealth
Blood cells in a bottle tutorial :)
Blood cells in a bottle tutorial :)
Published: 2012/05/21
Channel: COCO Chanou
How White Blood Cells Work
How White Blood Cells Work
Published: 2015/11/20
Channel: Mohamed Samir Mousa
Blood 2, Cells, structure and function of red and white blood cells
Blood 2, Cells, structure and function of red and white blood cells
Published: 2015/05/15
Channel: Dr. John Campbell
Homemade Syrup To Increase Red Blood Cells And Improve Your Blood Count
Homemade Syrup To Increase Red Blood Cells And Improve Your Blood Count
Published: 2016/12/28
Channel: Health Tips
Blood Cells Flowing in Microscope
Blood Cells Flowing in Microscope
Published: 2010/01/12
Channel: Rxe08
Natural killer cell(White blood cells) killing cancer cells
Natural killer cell(White blood cells) killing cancer cells
Published: 2016/06/24
Channel: AQIB WAJID
What Does a Low White Blood Cell Count Mean?
What Does a Low White Blood Cell Count Mean?
Published: 2017/06/28
Channel: NutritionFacts.org
White Blood Cell Chases Bacteria
White Blood Cell Chases Bacteria
Published: 2008/03/07
Channel: Adam Ryman
Once upon a time... Life - The blood (1 of 3)
Once upon a time... Life - The blood (1 of 3)
Published: 2010/01/01
Channel: isgota
How Red Blood Cells are Made Animation - Formation of RBC Video -Structure Function Blood Components
How Red Blood Cells are Made Animation - Formation of RBC Video -Structure Function Blood Components
Published: 2016/09/10
Channel: AniMed
Red Blood Cells: Why are they flexible and biconcave?
Red Blood Cells: Why are they flexible and biconcave?
Published: 2016/11/14
Channel: Smart Learning for All
CIRCULATORY SYSTEM ANATOMY: Blood cells model description
CIRCULATORY SYSTEM ANATOMY: Blood cells model description
Published: 2012/04/18
Channel: Samuel Chen
White Blood Cells
White Blood Cells
Published: 2015/02/25
Channel: WCC Anatomy and Physiology
White Blood Cells - What Are White Blood Cells - Types Of White Blood Cells
White Blood Cells - What Are White Blood Cells - Types Of White Blood Cells
Published: 2016/09/18
Channel: Whats Up Dude
What is Red Blood Cells , White Blood Cells, Platelets, Plasma
What is Red Blood Cells , White Blood Cells, Platelets, Plasma
Published: 2016/11/14
Channel: Sababa fakruddin
Red Blood Cells
Red Blood Cells
Published: 2017/07/11
Channel: Ace Aberrant
Haematology - Red Blood Cell Life Cycle
Haematology - Red Blood Cell Life Cycle
Published: 2014/09/29
Channel: Armando Hasudungan
Blood cell lineages | Human anatomy and physiology | Health & Medicine | Khan Academy
Blood cell lineages | Human anatomy and physiology | Health & Medicine | Khan Academy
Published: 2014/08/18
Channel: khanacademymedicine
Red blood cells | Human anatomy and physiology | Health & Medicine | Khan Academy
Red blood cells | Human anatomy and physiology | Health & Medicine | Khan Academy
Published: 2010/02/10
Channel: Khan Academy
Video 9 White Blood Cells Types and Functions
Video 9 White Blood Cells Types and Functions
Published: 2014/01/14
Channel: John Thomas
Function of Red Blood Cells
Function of Red Blood Cells
Published: 2014/04/13
Channel: AnatomyWorld
Structure and Function of White Blood Cells - Leukocytes - Leucocytes
Structure and Function of White Blood Cells - Leukocytes - Leucocytes
Published: 2015/03/31
Channel: 5MinuteSchool
The Role of Red Blood Cells in Anemia
The Role of Red Blood Cells in Anemia
Published: 2009/01/29
Channel: American Society of Hematology
Blood Cell Bakery--Introduction
Blood Cell Bakery--Introduction
Published: 2010/05/04
Channel: Joanne Manaster
Journey of a Red Blood Cell
Journey of a Red Blood Cell
Published: 2016/01/25
Channel: Alex Boulton
LIVE BLOOD CELL ANALYSIS MICROSCOPY
LIVE BLOOD CELL ANALYSIS MICROSCOPY
Published: 2017/03/26
Channel: Gnar Team
What Are White Blood Cells | Biology for All | FuseSchool
What Are White Blood Cells | Biology for All | FuseSchool
Published: 2016/10/23
Channel: FuseSchool - Global Education
Haematology - The Red Blood Cell Count
Haematology - The Red Blood Cell Count
Published: 2012/06/18
Channel: OER Africa
Causes of High White Blood Cells in children - Dr. Shaheena Athif
Causes of High White Blood Cells in children - Dr. Shaheena Athif
Published: 2016/04/28
Channel: Doctors' Circle - Ask Doctors. Free Video Answers.
How are Red Blood Cells made? Erythropoiesis - Erythropoietin - Regulation - Hematopoiesis
How are Red Blood Cells made? Erythropoiesis - Erythropoietin - Regulation - Hematopoiesis
Published: 2015/03/15
Channel: 5MinuteSchool
Video 6 Red Blood Cell Function
Video 6 Red Blood Cell Function
Published: 2014/01/14
Channel: John Thomas
Red Blood Cell Morphological Abnormalities
Red Blood Cell Morphological Abnormalities
Published: 2015/10/16
Channel: MedLecturesMadeEasy
Elevated Blood Cell Levels Medical Course
Elevated Blood Cell Levels Medical Course
Published: 2013/12/20
Channel: Abihail Abihu
Red blood cells and oxygen
Red blood cells and oxygen
Published: 2013/04/25
Channel: LSGScience
Chapter 11 Disorders of White Blood Cells and Lymphoid Tissues BIO216
Chapter 11 Disorders of White Blood Cells and Lymphoid Tissues BIO216
Published: 2017/02/04
Channel: Kyle Sorensen
Increase Red Blood Cells and Improve Your Blood Count With This Homemade Syrup
Increase Red Blood Cells and Improve Your Blood Count With This Homemade Syrup
Published: 2016/12/20
Channel: Healthy Life
White blood cells under the microscope 2000X
White blood cells under the microscope 2000X
Published: 2016/07/02
Channel: Under The Microscope
White Blood Cells -- Granulocytes
White Blood Cells -- Granulocytes
Published: 2014/10/01
Channel: susannaheinze
Medical animation of red blood cells
Medical animation of red blood cells
Published: 2007/02/04
Channel: Tom Guthery
Recycling of Red Blood Cells
Recycling of Red Blood Cells
Published: 2014/11/22
Channel: AK LECTURES
White Blood Cell Nursing Considerations, Normal Range, Nursing Care, Lab Values Nursing
White Blood Cell Nursing Considerations, Normal Range, Nursing Care, Lab Values Nursing
Published: 2016/09/30
Channel: NRSNG - NCLEX® Review (NRSNG.com)
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WIKIPEDIA ARTICLE

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Diagram showing the development of different blood cells from haematopoietic stem cells to mature cells.

A blood cell, also called a haematopoietic cell, hemocyte, or hematocyte, is a cell produced through hematopoiesis and found mainly in the blood.

Together, these three kinds of blood cells add up to a total 45% of the blood tissue by volume, with the remaining 55% of the volume composed of plasma, the liquid component of blood.[1] The volume percentage of red blood cells in the blood (hematocrit) is measured by centrifuge or flow cytometry and is 45% of cells to total volume in males and 45% in females.[2]

Haemoglobin (the main component of red blood cells) is an iron-containing protein that facilitates transportation of oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs.

Pulmonary Circulation- is the flow of blood from your heart to your lungs and back to the heart

Red blood cells[edit]

Red and white human blood cells as seen under a microscope using a blue slide stain
Scanning electron microscope image of circulating human blood, showing red and white blood cells (a few lymphocytes, monocytes, neutrophils), and disc-shaped platelets

Red blood cells or erythrocytes, primarily carry oxygen and collect carbon dioxide through the use of haemoglobin, and have a lifetime of about 120 days. In the process of being formed they go through a unipotent stem cell stage. They have the job alongside the white blood cells of protecting the healthy cells.

RBCs are formed in the red bone marrow in the adults. After the completion of their lifespan, they are destroyed in the spleen.

White blood cells[edit]

White blood cells or leukocytes, are cells of the immune system involved in defending the body against both infectious disease and foreign materials. Five diverse types of leukocytes exist, and are all produced and derived from multipotent cells in the bone marrow known as a hematopoietic stem cells. They live for about 3 to 4 days in the average human body. Leukocytes are found throughout the body, including the blood and lymphatic system.

The two main categories of white blood cells are granulocytes and agranulocytes.

Neutrophils (a type of granulocyte) are the most abundant of all the WBCs.

Platelets[edit]

Platelets, or thrombocytes or yellow blood cells, are very small, irregularly shaped clear cell fragments (i.e. cells that do not have a nucleus containing DNA), 2–3 µm in diameter, which derive from fragmentation of precursor megakaryocytes. The average lifespan of a platelet is normally just 5 to 9 days. Platelets are a natural source of growth factors. They circulate in the blood of mammals and are involved in hemostasis, leading to the formation of blood clots. Platelets release thread-like fibers to form these clots.

If the number of platelets is too low, excessive bleeding can occur. However, if the number of platelets is too high, blood clots can form thrombosis, which may obstruct blood vessels and result in such events as a stroke, myocardial infarction, pulmonary embolism—or blockage of blood vessels to other parts of the body, such as the extremities of the arms or legs. An abnormality or disease of the platelets is called a thrombocytopathy, which can be either a low number of platelets (thrombocytopenia), a decrease in function of platelets (thrombasthenia), or an increase in the number of platelets (thrombocytosis). There are disorders that reduce the number of platelets, such as heparin-induced thrombocytopenia (HIT) or thrombotic thrombocytopenic purpura (TTP), that typically cause thromboses, or clots, instead of bleeding.

Platelets release a multitude of growth factors including Platelet-derived growth factor (PDGF), a potent chemotactic agent, and TGF beta, which stimulates the deposition of extracellular matrix. Both of these growth factors have been shown to play a significant role in the repair and regeneration of connective tissues. Other healing-associated growth factors produced by platelets include basic fibroblast growth factor, insulin-like growth factor 1, platelet-derived epidermal growth factor, and vascular endothelial growth factor. Local application of these factors in increased concentrations through Platelet-rich plasma (PRP) has been used as an adjunct to wound healing for several decades.

Complete blood count[edit]

Blood components

A complete blood count (CBC) is a test panel requested by a doctor or other medical professional that gives information about the cells in a patient's blood. A scientist or lab technician performs the requested testing and provides the requesting medical professional with the results of the CBC. In the past, counting the cells in a patient's blood was performed manually, by viewing a slide prepared with a sample of the patient's blood under a microscope. Today, this process is generally automated by use of an automated analyzer, with only approximately 10-20% of samples now being examined manually. Abnormally high or low counts may indicate the presence of many forms of disease, and hence blood counts are amongst the most commonly performed blood tests in medicine, as they can provide an overview of a patient's general health status.

Discovery[edit]

In 1658 Dutch naturalist Jan Swammerdam was the first person to observe red blood cells under a microscope, and in 1695, microscopist Antoni van Leeuwenhoek, also Dutch, was the first to draw an illustration of "red corpuscles", as they were called. No further blood cells were discovered until 1842 when French physician Alfred Donné discovered platelets. The following year leukocytes were first observed by Gabriel Andral, a French professor of medicine, and William Addison, a British physician, simultaneously. Both men believed that both red and white cells were altered in disease. With these discoveries, hematology, a new field of medicine, was established. Even though agents for staining tissues and cells were available, almost no advances were made in knowledge about the morphology of blood cells until 1879, when Paul Ehrlich published his technique for staining blood films and his method for differential blood cell counting [3]

References[edit]

  1. ^ Maton, Anthea; Jean Hopkins; Charles William McLaughlin; Susan Johnson; Maryanna Quon Warner; David LaHart; Jill D. Wright (1993). Human Biology and Health. Englewood Cliffs, New Jersey, USA: Prentice Hall. ISBN 0-13-981176-1. 
  2. ^ Purves, William K.; Sadava, David; Orians, Gordon H.; Heller, H. Craig (2004). Life: The Science of Biology (7th ed.). Sunderland, Mass: Sinauer Associates. p. 954. ISBN 0-7167-9856-5. 
  3. ^ http://www.annclinlabsci.org/content/33/2/237.full.pdf

External links[edit]

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