Presentation on theme: "Keeping Your Body Healthy - Cardiovascular System -"— Presentation transcript:
1 Keeping Your Body Healthy - Cardiovascular System - Lesson 19p.208
2 Goals/ObjectivesIdentify parts and functions of the cardiovascular system.Identify behaviors to keep your cardiovascular system healthy.
3 Key Terms Cardiovascular system Nervous system Immune system Respiratory systemSkeletal systemMuscular systemEndocrine systemDigestive systemIntegumentary systemUrinary system
4 Body SystemsYour body is made up of cells, tissues, and organs that form body systems.A cell is the smallest living part of the body.An organ is a body part consisting of several kinds of tissue that do particular jobs.A body system is a group of organs that work together to perform a main body function.
5 Cardiovascular System The body system that transports nutrients, gases, hormones, and cellular waste products throughout the body is the cardiovascular system.consists of the blood, blood vessels, and the heart
6 BloodYour blood carries nutrients, oxygen, carbon dioxide, and cellular waste products to and from your body cells.Average sized adult has about 10 pints of bloodBlood is composed of plasma and blood cellsPlasma is the liquid component of blood (about 95% water)Plasmas contains red and white blood cells and particles called plateletsPlatelets helps the blood clot to stop bleeding when vessels are injured
7 White vs Red Blood Cells Red blood cells transport oxygen to body cells and removes carbon dioxide from body cells.Contains hemoglobin (iron-rich protein that helps transport oxygen and carbon dioxide in the blood).New cells are constantly produced in bone marrowWhite blood cells attack, surround, and destroy pathogens that enter the body and prevents infection.Pathogen is a germ that causes diseaseNumber of white cells increases with an infection
8 3 major types of blood vessels: ArteriesVeinsCapillaries
9 Blood VesselsArteryArtery Cross SectionLayer of cellsSmooth muscleConnective tissue
10 Arteries Artery carries blood away from the heart Have thick muscular walls that move blood between heartbeatsCoronary artery supplies nutrients and oxygen to the heart musclePulmonary artery carries blood from the heart to the lungs, where it absorbs oxygen and releases carbon dioxide
11 Veins & Capillaries Veins return blood to the heart Have thinner walls than arteriesCapillaries are tiny blood vessels that connect arteries and veins.Have thin walls that allow the transfer of nutrients, oxygen, carbon dioxide, and cellular waste between blood and body cells
12 Blood Vessels Capillary Vein Vein Cross Section Layer of cells Smooth muscleCapillary Cross SectionConnective tissueSingle layer of cells
13 FYI - AnemiaAnemia is a condition in which the amount of hemoglobin in the body, and the number of red blood cells that carry it, fall below normal.This causes the body to get less oxygen, which can lead to feelings of fatigue, weakness, loss of concentration, and dizziness, as well as more serious symptoms.Anemia can affect anyone, but people with kidney disease, rheumatoid arthritis, and inflammatory bowel disease are at the highest risk.
14 HeartA 4-chambered muscle that continually pumps blood throughout the body.Atria are the 2 upper chambers2 lower chambers are ventriclesdivided into the right atrium & ventricle and the left atrium & ventricle
15 The HeartAortacarries blood from the left ventricle to all parts of the body.Vena cavamajor vessel from upper body to heart51Pulmonary artery carries blood from heart to lungsPulmonary veins from lung to heart62Pulmonary veins from lung to heartRight Atrium receives blood from the body that is low in oxygen and high in carbon dioxide.37Left Atrium oxygen-rich blood is carried from the lungs to the left atrium.849Right Ventricle pumps oxygen-poor blood to the lungs.Left Ventricle pumps oxygen-rich blood from the heart through Aorta to the body.
18 Heart RateHeart rate is the # of times the heart contracts each minute.Pulse is the surge of blood that results from the contractions of the heart.Blood pressure is the force of blood against the artery walls.
19 Measuring Blood Pressure Blood pressure is the force with which blood pushes against the walls of your blood vessels.Normal Blood Pressure A blood pressure reading is considered normal if it falls within the range of 90/60 to 119/79.Low Blood Pressure Blood pressure lower than 90/60 is considered to be low blood pressure.High Blood Pressure A person whose blood pressure is consistently 140/90 or greater has high blood pressure, or hypertension.
20 How to Keep Your Cardiovascular System Healthy Reduce the amount of fat in your dietReduce the amount of salt in your dietExercise regularly to strengthen your heart musclesAvoid using tobacco products because they increase blood pressureMaintain a healthful weightPractice stress-management skills
21 Heart DiseaseThe most common type is coronary heart disease or coronary artery disease (CAD)With age, coronary arteries lose their elasticity and harden (arteriosclerosis).Atherosclerosis involves the buildup of deposits within the coronary arteries.The diameter of the arteries decreases, restricting and blocking blood flow of blood to the heartEffects of atherosclerosis on coronary arteries results in CAD
22 Heart Disease - Cholesterol Excess cholesterol is deposited in arteriesAs flow of blood to the heart is restricted, the heart’s ability to pump effectively is reduced.Angina – a person may feel pain in the chest, left shoulder, and left arm.Can result in heart attackSome of heart muscle tissue actually dies from lack of blood
23 Heart Disease – Symptoms of CAD Can range from not having any symptoms or discomfort to shortness of breath and fatigue, or to mild to severe chest pain
24 CAD – Risk Factors Risk factors for CAD include: Age Family history of heart diseaseHigh blood cholesterolSmokingHigh blood pressureDiabetesOverweight/obesityPhysical inactivityCAD is the leading cause of death for both men and women in America today.More than 13 million suffer
25 Questions What is the function of blood? What is a red blood cell? What is the function of a white blood cell?What are the important differences between the 3 major types of blood vessels?How does oxygen get into the blood?