The Circulatory System

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The Circulatory System
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Presentation transcript:

The Circulatory System Chapter 23

Two types of circulatory systems

Human Cardiovascular System The pulmonary circuit carries blood between the heart and the lungs

Human Cardiovascular System The systemic circuit carries blood between the heart and the rest of the body

Figure 23.5-s1 1 Heart is relaxed. Blood flows in. DIASTOLE 0.4 sec

2 1 DIASTOLE SYSTOLE Atria contract. Blood is forced into ventricles. Figure 23.5-s2 2 Atria contract. Blood is forced into ventricles. 1 Heart is relaxed. Blood flows in. 0.1 sec DIASTOLE SYSTOLE 0.4 sec

2 1 DIASTOLE SYSTOLE 3 Atria contract. Figure 23.5-s3 2 Atria contract. Blood is forced into ventricles. 1 Heart is relaxed. Blood flows in. 0.1 sec 0.3 0.8 sec sec DIASTOLE SYSTOLE 0.4 sec 3 Ventricles contract. Blood is pumped out.

Regular heartbeat vs. heart murmur https://www.youtube.com/watch?v=uFoUATyZvLQ

Heart’s natural pacemaker

Heart rate can be measured with an ECG

Artificial pacemakers In certain kinds of heart disease, the heart’s electrical control fails to maintain a normal rhythm

Do you know your resting heart rate?

Improving Heart Health

Blood vessels

Blood Plasma Red blood cells White blood cells Platelets

Red Blood Cells - Erythrocytes

Anemia Low RBC or low hemoglobin = low oxygen results in tiredness and exhaustion

White Blood Cells - Leukocytes

Leukemia Leukemia is cancer of the body's blood- forming tissues, including the bone marrow and the lymphatic system

Platelets

Cardiovascular Disease

Helpful review videos https://www.youtube.com/watch?v=9fxm85Fy4sQ https://www.youtube.com/watch?v=NJzJKvkWWDc

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