Cardiovascular and Respiratory Systems.docx - Human Anatomy...

This preview shows page 1 - 7 out of 59 pages.

Human Anatomy 1420-02 Section 5 Syllabus: Cardiovascular and Respiratory Systems S ECTION 5 S YLLABUS C ARDIOVASCULAR S YSTEM R ESPIRATORY S YSTEM 1
Human Anatomy 1420-02 Section 5 Syllabus: Cardiovascular and Respiratory Systems C ARDIOVASCULAR S YSTEM The Heart and Circulatory System 2
Human Anatomy 1420-02 Section 5 Syllabus: Cardiovascular and Respiratory Systems The Heart Overview Right side of the heart receives blood from the body and pumps blood through the pulmonary circulation Pulmonary circulation carries blood to the lungs and returns it to the left side of the heart In the lungs, carbon dioxide diffuses from the blood into the lungs and oxygen diffuses from the lungs into the blood Once blood returns from the lungs it enters the left side of the heart The left side of the heart pumps blood through the systemic circulation, which delivers oxygen and nutrients to the tissues of the body From those tissues, carbon dioxide and waste products are carried back to the right side of the heart 3 CIRCULATORY SYSTEM OVERVIEW 20.1
Human Anatomy 1420-02 Section 5 Syllabus: Cardiovascular and Respiratory Systems Functions of the heart The heart generates blood pressure. Contractions are responsible for moving blood through the blood vessels. The heart separates the pulmonary and systemic circulations Valves ensure a one-way flow of blood through the heart and blood vessels The rate and force of heart contractions change to meet the metabolic needs of the tissues. These needs change, depending on conditions, such as rest, exercise and changes in body position. 4
Human Anatomy 1420-02 Section 5 Syllabus: Cardiovascular and Respiratory Systems H EART A NATOMY : O VERVIEW Adult heart is shaped like a blunt cone Approximately the size of a closed fist Larger in physically active adults Decreases in size after 65 Located in the mediastinum (cavity in the thorax) Apex o Blunt rounded point o Located deep to the fifth intercostal space, 7-9 cm to the left of the sternum o Medial to the midclavicular line Base o Flat, larger part o Located deep to the sternum o Extends to the second intercostal space Lies in an oblique position, with base directed posteriorly and slightly superiorly and apex directed anteriorly and inferiorly and to the left Two-thirds of heart’s mass lies to the left of the midline of the sternum HEART POSITION 20.2 H EART A NATOMY : V EINS ( DEOXYGENATED BLOOD FROM BODY TO HEART ) 5
Human Anatomy 1420-02 Section 5 Syllabus: Cardiovascular and Respiratory Systems Superior vena cava and Inferior vena cava Carry de-oxygenated blood from the body to the right atrium SVC: head and neck IVC: lower extremities Pulmonary veins (4) Carry oxygenated blood from the lungs to the left atrium most veins in the body are blue because they carry deoxygenated blood, except for the pulmonary veins because they carry blood from the lungs to the heart.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture