Made of 3 parts1. Blood

2. Blood Vessels

3. Heart

Blood

• Plasma- liquid portion of blood: water and dissolved substances (60% of blood volume)

• Red Blood Cells (RBCs)- transport oxygen– Hemoglobin- protein in RBCs that carry oxygen– No Nuclei or Mitochondria

• White Blood Cells- defend against disease• Platelets- help blood clot

– Hemophilia- disease where person lacks platelets

Blood Vessels

• Arteries- carry blood away from heart– Branch into arterioles into capillaries

• Veins- carry blood to heart– Capillaries come together to form venules

which come together becoming veins

• Capillaries- one cell thick; tiny vessels that exchange gases between blood and body cells

The Heart

Chambers: 4Left Ventricle, Right Ventricle, Left Atrium, Right Atrium

Blood vessels: Aorta, Vena Cavae, Pulmonary Artery, Pulmonary Vein

Valves

Heart Diagram

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Heart Picture

Heart Cont.

• Atria- receive blood and pump to ventricles

• Ventricles- pump blood out of heart

• Valves-ensure blood flows in one direction– Heart beat cause by blood hitting valves

• “Lup”- blood exits atria, enters ventricles and hits valves

• “Dup”- blood leaves ventricles, enters blood vessels, and hits valves

Open Heart Surgery

• Surgery Time

• Bad Heart