Cardiovascular System Brien Johnson & Brent Paulson Hour 2

Key Vocabulary Cardiovascular: of or relating to the heart and blood vessels. Artery: any of the muscular-walled tubes forming part of the circulation system by which blood (mainly that which has been oxygenated) is conveyed from the heart to all parts of the body. Vein: any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood toward the heart. Blood Vessel: a tubular structure carrying blood through the tissues and organs; a vein, artery, or capillary. Capillary: any of the fine branching blood vessels that form a network between the arterioles and venules.

How it works and why it’s important The cardiovascular system is composed of many different veins, arteries, and capillaries. All of these components make up blood vessels. The cardiovascular system’s job is to carry the oxygen, nutrients, hormones, and the cellular waste product around the body. Without this, we wouldn’t have oxygen in our cells and we would die.

Diagram and definitions All arteries carry blood away from the heart, while all blood travels back to the heart through veins. The biggest artery in the body is the aorta. The blood in the left atrium is oxygenated, while the right atrium is full of deoxygenated blood.

Unique Details Heart rate is the number of times your heart beats, or pumps blood, usually measured per minute. It is calculated by counting the pulses, usually in your neck or wrist. As you get more active your heart rate increases, and your resting heart rate decreases, meaning your heart is stronger.

Teen Injuries and Diseases Though it is not as commonly found in teens as it is in adults, cardiovascular disease is a major killer of teens. Cardiovascular disease, also known as heart disease, is caused by high blood pressure, high cholesterol, diabetes, smoking, and physical inactivity. It is commonly found in men and can be genetic.

Disease Prevention Heart disease is the most deadly killer, killing more people each year than cancer. Factors that can increase risk include your gender, age and race. The easiest ways to prevent heart disease are not smoking, exercising at least 30 minutes daily, and maintaining a healthy diet. Heart disease is not any one disease, but rather a class of diseases that involve the heart, the blood vessels or both. The most common killer is a buildup of plaque in the arteries, restricting blood flow.

Close interaction with other systems Urinary system: The urinary system helps to clean the waste products in your blood that come from the skeletal system. Respiratory system: Gives the body oxygen and some of the oxygen goes to the circulatory system to give oxygen to your cells. Digestive system: The digestive system gives the heart nutrients so that it can function smoothly and keep beating. Muscular system: The heart is actually a muscle so it is apart of both the muscular system and the cardiovascular system. It pumps blood to the muscles. Skeletal system: The skeletal system has bones that are designed to protect the heart and the cardiovascular system.

How to keep the Cardiovascular system healthy Exercise: If you exercise for at least 30 minutes every day you will be able to help prevent heart disease and strengthen your heart Avoid tobacco and alcohol use: Tobacco can cause serious damage to your heart and cardiovascular system. It expells chemicals into your system which can cause atherosclerosis. Eat healthy: Eating healthy can improve your circulatory system and reduce the risk of heart disease. You should eat 5-10 servings of fruits and vegetables, whole grains and low-fat dairy products and avoid eating foods with saturated and trans fat.

Quiz Questions 1) Do veins pump blood to or from the heart? A. Towards C. Both Directions B. Away D. Neither 2) What kills more people? A. HIV/AIDS C. They Kill The Same B. Heart Disease D. Cancer

Quiz Questions 3) What is the main organ of the Cardiovascular System? A. Artery C. Brain B. Heart D. Blood