{"id":3897,"date":"2023-01-09T10:46:12","date_gmt":"2023-01-09T10:46:12","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3897"},"modified":"2025-11-06T05:13:57","modified_gmt":"2025-11-06T05:13:57","slug":"s-11-a-circulatory-system","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-11-a-circulatory-system\/","title":{"rendered":"S-11.a Circulatory System"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Circulatory System<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div style=\"position: relative; width: 100%; height: 0; padding-top: 56.2500%;\n padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden;\n border-radius: 8px; will-change: transform;\">\n  <iframe loading=\"lazy\" style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;\"\n    src=\"https:\/\/www.canva.com\/design\/DAGArKyL5Ig\/7WcNdleG80rhTEu0Db_NZQ\/watch?embed\" allowfullscreen=\"allowfullscreen\" allow=\"fullscreen\">\n  <\/iframe>\n<\/div>\n<a href=\"https:&#x2F;&#x2F;www.canva.com&#x2F;design&#x2F;DAGArKyL5Ig&#x2F;7WcNdleG80rhTEu0Db_NZQ&#x2F;watch?utm_content=DAGArKyL5Ig&amp;utm_campaign=designshare&amp;utm_medium=embeds&amp;utm_source=link\" target=\"_blank\" rel=\"noopener\">circulatory system<\/a> by Delta publications\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\"><strong>Key Notes :<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-11d81e5e85a0b14c3dbdeb33f34db0de\" style=\"color:#000060\"><strong>What is the Circulatory System?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The circulatory system is a network of blood vessels and organs that transport blood, nutrients, gases (like oxygen and carbon dioxide), and waste products throughout the body.<\/li>\n\n\n\n<li>It consists of the <strong>heart<\/strong>, <strong>blood vessels<\/strong>, and <strong>blood<\/strong>.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-527049d729f1a8497845bc6be68413e9\" style=\"color:#000060\"><strong>Main Parts of the Circulatory System:<\/strong><\/h3>\n\n\n\n<p class=\"has-large-font-size\"><strong>Heart<\/strong>: A muscular organ that pumps blood throughout the body.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Left side<\/strong>: Pumps oxygenated blood to the body.<\/li>\n\n\n\n<li><strong>Right side<\/strong>: Pumps deoxygenated blood to the lungs.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Blood Vessels<\/strong>: Tubes that carry blood throughout the body.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Arteries<\/strong>: Carry oxygenated blood away from the heart to the body (except the pulmonary artery).<\/li>\n\n\n\n<li><strong>Veins<\/strong>: Carry deoxygenated blood back to the heart (except the pulmonary vein).<\/li>\n\n\n\n<li><strong>Capillaries<\/strong>: Tiny blood vessels that connect arteries and veins, allowing exchange of gases, nutrients, and waste.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Blood<\/strong>: Fluid that carries nutrients, oxygen, and waste products.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Red Blood Cells (RBCs)<\/strong>: Carry oxygen from the lungs to the body and return carbon dioxide from the body to the lungs.<\/li>\n\n\n\n<li><strong>White Blood Cells (WBCs)<\/strong>: Help fight infections and diseases.<\/li>\n\n\n\n<li><strong>Platelets<\/strong>: Help in blood clotting to prevent excessive bleeding.<\/li>\n\n\n\n<li><strong>Plasma<\/strong>: The liquid component of blood, transporting nutrients, hormones, and waste products.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-908a3ef0b56e7df6070e53cb0d747cb8\" style=\"color:#000060\"><strong>Function of the Circulatory System:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Transportation<\/strong>: Delivers oxygen and nutrients to cells and removes waste products like carbon dioxide and urea.<\/li>\n\n\n\n<li><strong>Temperature Regulation<\/strong>: Helps maintain body temperature by distributing heat throughout the body.<\/li>\n\n\n\n<li><strong>Protection<\/strong>: Blood carries immune cells that protect the body from infections and diseases.<\/li>\n\n\n\n<li><strong>Hormone Transport<\/strong>: Blood carries hormones from glands to target organs for regulation of bodily functions.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-7dc9ad3e48c914af63de4e728007009f\" style=\"color:#000060\"><strong>How the Heart Works:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The heart has four chambers: two atria (upper chambers) and two ventricles (lower chambers).<\/li>\n\n\n\n<li><strong>Deoxygenated blood<\/strong> flows from the body into the right atrium, through the right ventricle, and is pumped to the lungs for oxygenation.<\/li>\n\n\n\n<li><strong>Oxygenated blood<\/strong> returns from the lungs to the left atrium, flows into the left ventricle, and is pumped to the rest of the body.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-eb866a6bb32fc8561ea9946da30602a7\" style=\"color:#000060\"><strong>Blood Circulation Pathways:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Systemic Circulation<\/strong>: Movement of oxygenated blood from the heart to the body and back to the heart with deoxygenated blood.<\/li>\n\n\n\n<li><strong>Pulmonary Circulation<\/strong>: Movement of deoxygenated blood from the heart to the lungs and back, where it is oxygenated.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c5702085efde58e67ebd3d75697fec14\" style=\"color:#000060\"><strong>Circulatory System and Health:<\/strong><\/h3>\n\n\n\n<p class=\"has-large-font-size\"><strong>Healthy Lifestyle<\/strong>: Regular exercise, balanced diet, and avoiding smoking help maintain a healthy circulatory system.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong>Common Diseases<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Atherosclerosis<\/strong>: Build-up of plaque in arteries, reducing blood flow.<\/li>\n\n\n\n<li><strong>Hypertension<\/strong>: High blood pressure can damage blood vessels and the heart.<\/li>\n\n\n\n<li><strong>Heart Attack<\/strong>: Occurs when blood flow to a part of the heart is blocked.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-661d6b6ba968ad6b16eabe6f589ce6cb\" style=\"color:#000060\"><strong>Fun Fact:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">The human circulatory system, if laid out end to end, would stretch for about 100,000 kilometers!<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/80321\/177\/478\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-54.png\" alt=\"\" class=\"wp-image-6005\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-54.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-54-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-54-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-54-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/80477\/090\/862\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-49.png\" alt=\"\" class=\"wp-image-6006\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-49.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-49-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-49-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-49-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Circulatory System circulatory system by Delta publications Key Notes : What is the Circulatory System? Main Parts of the Circulatory System: Heart: A muscular organ that pumps blood throughout the body. Blood Vessels: Tubes that carry blood throughout the body. Blood: Fluid that carries nutrients, oxygen, and waste products. Function of the Circulatory System: How<a class=\"more-link\" href=\"https:\/\/7thclass.deltapublications.in\/index.php\/s-11-a-circulatory-system\/\">Continue reading <span class=\"screen-reader-text\">&#8220;S-11.a Circulatory System&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-3897","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3897"}],"version-history":[{"count":18,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3897\/revisions"}],"predecessor-version":[{"id":17545,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3897\/revisions\/17545"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}