Blood, marrow, and the lymphatic systemBBlood, marrow, and the lymphatic systemBlood, Marrow, and the Lymphatic SystemEnglishOncologyChild (0-12 years);Teen (13-18 years)BodySkeletal systemConditions and diseasesAdult (19+)NA2018-03-06T05:00:00ZOussama Abla, MDDanielle Weidman, MDKarin Landenberg, MD000Flat ContentHealth A-Z<p> Learn how blood works, what bone marrow is and how the lymphatic system works inside our bodies.</p><p>Our blood, marrow, and the lymphatic system are closely linked and constantly working together to fuel our bodies.</p><h2> Key points </h2><ul><li>Blood carries oxygen from our lungs to the parts of the body that need it. It also brings carbon dioxide back from the body to the lungs.</li><li>Blood is made up of red blood cells, platelets, and different kinds of white blood cells. </li><li>Our bone marrow continuously makes new red and white blood cells.</li><li> The lymphatic system consists of the bone marrow, the spleen, the thymus (in young people), and lymph nodes. </li><li>The three major types of lymphocytes inclulde B-lymphocytes, T-lymphocytes, and Natural killer (NK) cells.</li></ul>
Sang, moelle osseuse et le système lymphatiqueSSang, moelle osseuse et le système lymphatiqueBlood, Marrow, and the Lymphatic SystemFrenchOncologyChild (0-12 years);Teen (13-18 years)BodySkeletal systemConditions and diseasesAdult (19+)NA2018-03-06T05:00:00ZOussama Abla, MDDanielle Weidman, MDKarin Landenberg, MDFlat ContentHealth A-Z<p>Vous apprendrez comment fonctionne le sang, ce qu’est la moelle osseuse et comment fonctionne le système lymphatique.</p><p>Le sang, la moelle osseuse et le système lymphatique sont étroitement liés et fonctionnent en étroite et constante collaboration afin d’alimenter notre organisme.</p><h2>À retenir</h2> <ul><li>Le sang transporte l’oxygène depuis les poumons vers les parties du corps qui en ont besoin. Le sang retourne également le dioxyde de carbone produit par l’organisme vers les poumons.</li><li>Le sang est constitué de globules rouges, de plaquettes et de différents types de globules blancs.</li><li>La moelle osseuse produit continuellement de nouveaux globules rouges et globules blancs.</li><li>Le système lymphatique comprend la moelle osseuse, la rate, le thymus (chez les enfants) et les ganglions lymphatiques. </li><li>Les trois plus importants types de lymphocytes sont les lymphocytes B, les lymphocytes T et les cellules tueuses naturelles.</li></ul>

 

 

Blood, marrow, and the lymphatic system2832.00000000000Blood, marrow, and the lymphatic systemBlood, Marrow, and the Lymphatic SystemBEnglishOncologyChild (0-12 years);Teen (13-18 years)BodySkeletal systemConditions and diseasesAdult (19+)NA2018-03-06T05:00:00ZOussama Abla, MDDanielle Weidman, MDKarin Landenberg, MD000Flat ContentHealth A-Z<p> Learn how blood works, what bone marrow is and how the lymphatic system works inside our bodies.</p><p>Our blood, marrow, and the lymphatic system are closely linked and constantly working together to fuel our bodies.</p><h2> Key points </h2><ul><li>Blood carries oxygen from our lungs to the parts of the body that need it. It also brings carbon dioxide back from the body to the lungs.</li><li>Blood is made up of red blood cells, platelets, and different kinds of white blood cells. </li><li>Our bone marrow continuously makes new red and white blood cells.</li><li> The lymphatic system consists of the bone marrow, the spleen, the thymus (in young people), and lymph nodes. </li><li>The three major types of lymphocytes inclulde B-lymphocytes, T-lymphocytes, and Natural killer (NK) cells.</li></ul><h2>Blood</h2><p>Blood carries the oxygen we breathe from our lungs to the parts of the body that need it. It also brings carbon dioxide back from the body to the lungs, so that it can be removed when we exhale. Carbon dioxide is produced when the cells in the body make energy to fuel the body.</p> <figure><span class="asset-image-title">The Components of Blood <img src="http://assets.aboutkidshealth.ca/akhassets/Blood_components_MED_ILL_EN.jpg" alt="" /><figcaption class="asset-image-caption">Blood is made up of red blood cells, platelets, and different kinds of white blood cells. These cells are all suspended in liquid plasma.</figcaption> </span></figure> <p>Blood is made up of cells that float inside a clear liquid called plasma. The plasma is mainly water. It also contains:<br></p><ul><li>proteins such as albumin, antibodies (defense proteins), and clotting factors, which help slow down bleeding from a cut or other injury</li><li>hormones, such as thyroid hormones<br></li><li>minerals such as iron, calcium, magnesium, sodium, and potassium</li><li>vitamins such as folate and vitamin B12</li></ul><p>The cells that are suspended in the plasma include: </p><ul><li>red blood cells, which make up 40% to 50% of the blood. They are red because they are filled with a protein called hemoglobin. Oxygen and carbon dioxide attach to hemoglobin. The red blood cells carry oxygen from the lungs to the body and deliver carbon dioxide from the body to the lungs. Red blood cells have a life-span of 120 days. For this reason, the bone marrow continuously makes new red blood cells. </li><li>platelets are small cells that help stop bleeding at sites of the body that are cut or injured. The scab that forms over a small cut is made possible thanks to platelets. The bone marrow continuously makes new platelets, because they only live for about 10 days inside our blood.</li><li> white blood cells, which fight infection. </li></ul><p>There are different types of white cells in the blood, including: </p><ul><li>neutrophils and monocytes, which engulf bacteria or fungi in our body to fight infection</li><li>eosinophils and basophils, which respond to allergic conditions</li><li>ymphocytes, which are also found in the lymph nodes, spleen, and lymphatic channels</li></ul><p>There are three major types of lymphocytes, which are a key part of the immune system. These include:</p><ul><li>B-lymphocytes, which originate in the bone marrow, produce antibodies to fight off infection. The antibody attaches to the microbe, tagging it as "foreign". Infection-fighting cells called neutrophils can now recognize the microbe, engulf and digest it.</li><li>T-lymphocytes, which originate in the thymus, help B-lymphocytes make antibodies against invading bacteria, viruses, or other microbes. </li><li>Natural killer (NK) cells are lymphocytes that directly attack virus-infected cells.</li></ul><p>The life-span of white blood cells is also limited, and our bone marrow continuously makes new white blood cells.</p><h2>Bone marrow</h2><p>Blood cells are made inside the spongy tissue in our bones, called bone marrow. The process of blood cell formation is called haematopoiesis. Blood cells start off as stem cells, which are young cells that grow into mature blood cells. Healthy people have enough stem cells to keep on producing new blood cells, continuously. </p><p>Blood flows through the marrow to pick up fully formed platelets, red cells and white cells to circulate to the rest of the body. </p> <figure><span class="asset-image-title">Bone marrow <img src="http://assets.aboutkidshealth.ca/akhassets/Bone_marrow_MED_ILL_EN.jpg" alt="" /><figcaption class="asset-image-caption">Bone marrow is contained within bones. All blood cells are produced in the bone marrow. </figcaption> </span></figure> <h2>The lymphatic system</h2><p>The blood-cell-forming system in our marrow is closely linked to our lymphatic system. The lymphatic system consists of the bone marrow, the spleen, and in young people, the thymus. It also consists of lymph nodes, which are scattered throughout the body. The lymphocytes travel between each node through the lymphatic channels, which meet at large ducts that empty into a blood vessel. The lymphocytes enter the blood through these ducts. </p>Blood, marrow, and the lymphatic systemFalse

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