Chapter 30

Cardiovascular System

Key Notes: On 30.1

  • Lymph vessels, Lymph nodes, Spleen, tonsils, adenoids Thymus, Blood vessels, blood and heart are main structures of the cardiovascular system.
  • The three types of blood vessels in the body are arteries, veins, and capillaries.
  • The tonsils, thymus and spleen are main structures of the lymphatic system.
  • The lymphatic system works with the cardiovascular system to return body fluids to the blood.

Key Notes: on 30.2

  • Structures of the heart are the, atrium and ventricle.
  • Valves in the heart keep the blood flowing in one direction. Blood only moves forward through the heart, the valves stop the blood from flowing backward.
  • Coronary circulation is the circulation of blood in the blood vessels of the heart muscle
  • Blood flows through the heart in two separate loops. There is a left side loop and a right side loop, the right side loop collects oxygen-poor blood from the body and pumps it into the lungs, where it releases carbon dioxide and picks up oxygen. The left side loop carries the oxygen-rich blood back from the lungs into the left side of the heart, which then pumps the oxygen-rich blood to the rest of the body.

Key Notes: 30.3

  • Main parts of blood are made of red blood cells, white blood cells, platelets, and plasma.
  • The defense of the body against diseases, the movement of chemical messages likes hormones and hormone-like substances, the control of body temperature and the repair of damage to body tissues.
  • Hemoglobin is the protein that carries oxygen in red blood cells.
  • White blood cells defend the body against infection by bacteria, viruses, and other diseases.
  • The importance of ABO blood system is that it can receive and give blood.
  • Anemia, Leukemia and Lymphoma are blood disorders and diseases.

Key Notes: on 30.4

  • The pressure of the circulating blood slowly decreases as blood moves from the arteries, and into the smaller blood vessels. The pressure causes the walls of the arteries to move in a rhythmic fashion.
  • The healthy ranges for blood pressure are Systolic, less than 120 mm Hg. And Diastolic, less than 80 mm Hg
  • The healthy ranges for blood pressure are Systolic, less than 120 mm Hg. And Diastolic, less than 80 mm Hg are all cardiovascular diseases.
  • Give up smoking or never start to smoke is the best way to reduce the risk of heart disease. Things you can do to avoid Cardiovascular Disease, diabetes, High cholesterol levels, obesity, High blood pressure, Lack of physical activity and not eating well.

By: Claudia Bare