{"id":26,"date":"2016-08-19T15:07:22","date_gmt":"2016-08-19T15:07:22","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/?post_type=chapter&#038;p=26"},"modified":"2016-08-19T15:24:20","modified_gmt":"2016-08-19T15:24:20","slug":"introduction-to-the-heart","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/chapter\/introduction-to-the-heart\/","title":{"raw":"Introduction to the Heart","rendered":"Introduction to the Heart"},"content":{"raw":"<figure id=\"fig-ch20_00_01\" class=\"splash\">\r\n<div data-type=\"title\"><strong>Human Heart<\/strong><\/div>\r\n<figcaption>This artist\u2019s conception of the human heart suggests a powerful engine\u2014not inappropriate for a muscular pump that keeps the body continually supplied with\u00a0blood. (credit: Patrick J. Lynch)<\/figcaption><span id=\"fs-id2001437\" data-type=\"media\" data-alt=\"This photo shows a human heart.\">\r\n<img src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/511\/2016\/08\/19150354\/2000_Human_Heart_Photo.jpg\" alt=\"This photo shows a human heart.\" width=\"500\" data-media-type=\"image\/jpg\" \/><\/span>\r\n\r\n<\/figure>\r\n<div class=\"bcc-box bcc-highlight\">\r\n<h3>Chapter Learning Objectives<\/h3>\r\nAfter studying this chapter, you will be able to:\r\n<ul id=\"fs-id1169715901379\">\r\n \t<li>Identify and describe the interior and exterior parts of the human heart<\/li>\r\n \t<li>Describe the path of blood through the cardiac circuits<\/li>\r\n \t<li>Describe the size, shape, and location of the heart<\/li>\r\n \t<li>Compare cardiac muscle to skeletal and smooth muscle<\/li>\r\n \t<li>Explain the cardiac conduction system<\/li>\r\n \t<li>Describe the process and purpose of an electrocardiogram<\/li>\r\n \t<li>Explain the cardiac cycle<\/li>\r\n \t<li>Calculate cardiac output<\/li>\r\n \t<li>Describe the effects of exercise on cardiac output and heart rate<\/li>\r\n \t<li>Name the centers of the brain that control heart rate and describe their function<\/li>\r\n \t<li>Identify other factors affecting heart rate<\/li>\r\n \t<li>Describe fetal heart development<\/li>\r\n<\/ul>\r\n<\/div>\r\n<div id=\"fs-id1169723562101\" class=\"chapter-objectives\" data-type=\"note\"><\/div>\r\n<p id=\"fs-id3033659\">In this chapter, you will explore the remarkable pump that propels the blood into the vessels. There is no single better word to describe the function of the heart other than \u201cpump,\u201d since its contraction develops the pressure that ejects blood into the major vessels: the aorta and pulmonary trunk. From these vessels, the blood is distributed to the remainder of the body. Although the connotation of the term \u201cpump\u201d suggests a mechanical device made of steel and plastic, the anatomical structure is a living, sophisticated muscle. As you read this chapter, try to keep these twin concepts in mind: pump and muscle.<\/p>\r\n<p id=\"fs-id2674748\">Although the term \u201cheart\u201d is an English word, cardiac (heart-related) terminology can be traced back to the Latin term, \u201ckardia.\u201d Cardiology is the study of the heart, and cardiologists are the physicians who deal primarily with the heart.<\/p>","rendered":"<figure id=\"fig-ch20_00_01\" class=\"splash\">\n<div data-type=\"title\"><strong>Human Heart<\/strong><\/div><figcaption>This artist\u2019s conception of the human heart suggests a powerful engine\u2014not inappropriate for a muscular pump that keeps the body continually supplied with\u00a0blood. (credit: Patrick J. Lynch)<\/figcaption><span id=\"fs-id2001437\" data-type=\"media\" data-alt=\"This photo shows a human heart.\"><br \/>\n<img decoding=\"async\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/511\/2016\/08\/19150354\/2000_Human_Heart_Photo.jpg\" alt=\"This photo shows a human heart.\" width=\"500\" data-media-type=\"image\/jpg\" \/><\/span><\/p>\n<\/figure>\n<div class=\"bcc-box bcc-highlight\">\n<h3>Chapter Learning Objectives<\/h3>\n<p>After studying this chapter, you will be able to:<\/p>\n<ul id=\"fs-id1169715901379\">\n<li>Identify and describe the interior and exterior parts of the human heart<\/li>\n<li>Describe the path of blood through the cardiac circuits<\/li>\n<li>Describe the size, shape, and location of the heart<\/li>\n<li>Compare cardiac muscle to skeletal and smooth muscle<\/li>\n<li>Explain the cardiac conduction system<\/li>\n<li>Describe the process and purpose of an electrocardiogram<\/li>\n<li>Explain the cardiac cycle<\/li>\n<li>Calculate cardiac output<\/li>\n<li>Describe the effects of exercise on cardiac output and heart rate<\/li>\n<li>Name the centers of the brain that control heart rate and describe their function<\/li>\n<li>Identify other factors affecting heart rate<\/li>\n<li>Describe fetal heart development<\/li>\n<\/ul>\n<\/div>\n<div id=\"fs-id1169723562101\" class=\"chapter-objectives\" data-type=\"note\"><\/div>\n<p id=\"fs-id3033659\">In this chapter, you will explore the remarkable pump that propels the blood into the vessels. There is no single better word to describe the function of the heart other than \u201cpump,\u201d since its contraction develops the pressure that ejects blood into the major vessels: the aorta and pulmonary trunk. From these vessels, the blood is distributed to the remainder of the body. Although the connotation of the term \u201cpump\u201d suggests a mechanical device made of steel and plastic, the anatomical structure is a living, sophisticated muscle. As you read this chapter, try to keep these twin concepts in mind: pump and muscle.<\/p>\n<p id=\"fs-id2674748\">Although the term \u201cheart\u201d is an English word, cardiac (heart-related) terminology can be traced back to the Latin term, \u201ckardia.\u201d Cardiology is the study of the heart, and cardiologists are the physicians who deal primarily with the heart.<\/p>\n\n\t\t\t <section class=\"citations-section\" role=\"contentinfo\">\n\t\t\t <h3>Candela Citations<\/h3>\n\t\t\t\t\t <div>\n\t\t\t\t\t\t <div id=\"citation-list-26\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Shared previously<\/div><ul class=\"citation-list\"><li>Anatomy &amp; Physiology. <strong>Authored by<\/strong>: OpenStax. <strong>Provided by<\/strong>: OpenStax CNX. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"http:\/\/cnx.org\/contents\/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@8.25\">http:\/\/cnx.org\/contents\/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@8.25<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em>. <strong>License Terms<\/strong>: Download for free at http:\/\/cnx.org\/contents\/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@8.25.<\/li><\/ul><\/div>\n\t\t\t\t\t\t <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t <\/section>","protected":false},"author":17,"menu_order":1,"template":"","meta":{"_candela_citation":"[{\"type\":\"cc\",\"description\":\"Anatomy & Physiology\",\"author\":\"OpenStax\",\"organization\":\"OpenStax CNX\",\"url\":\"http:\/\/cnx.org\/contents\/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@8.25\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"Download for free at http:\/\/cnx.org\/contents\/14fb4ad7-39a1-4eee-ab6e-3ef2482e3e22@8.25.\"}]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-26","chapter","type-chapter","status-publish","hentry"],"part":19,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/pressbooks\/v2\/chapters\/26","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/wp\/v2\/users\/17"}],"version-history":[{"count":2,"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/pressbooks\/v2\/chapters\/26\/revisions"}],"predecessor-version":[{"id":139,"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/pressbooks\/v2\/chapters\/26\/revisions\/139"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/pressbooks\/v2\/parts\/19"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/pressbooks\/v2\/chapters\/26\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/wp\/v2\/media?parent=26"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/pressbooks\/v2\/chapter-type?post=26"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/wp\/v2\/contributor?post=26"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/umd-publichealthbio\/wp-json\/wp\/v2\/license?post=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}