The Circulatory System

• Depending on the type of antigen present on a persons red blood cells

• Tube in which blood flows

• Thoracic /Chest cavity

• 72 bpm

• Pumps oxygen rich blood

• Pumps deoxygenated blood

• Septum

• Atria

• Ventricles

• Pulmonary vein

• Vena Cava

• Aorta

• Pulmonary artery

• Left ventricle has to pump blood further than the right ventricle, therefore there is more pressure on the left ventricle

• Coronary artery

• Coronary vein

• A blood pathway that begins with and ends with capillaries

1. Vena Cava carries deoxygenated blood from the body to the Right Atrium
2. The Right Atrium then pumps blood into the Right Ventricle
3. The Right Ventricle then pumps the blood to the Pulmonary Artery
4. The Pulmonary Artery pumps the deoxygenated blood to the Lungs
5. Capillaries in the lungs oxygenate the blood and remove carbon dioxide
6. Pulmonary Vein carries oxygenated blood from lungs to the Left Atrium
7. Left Atrium pumps blood into Left Ventricle
8. Left Ventricle then pumps blood into Aorta
9. Aorta carries oxygenated blood all around the body

• Atrial diastole

• Atrial systole

REMEMBER - S for Stress

• Ventricular diastole

• Ventricular systole

1. Blood enters the heart through the vena cava and pulmonary vein
2. The sino-atrial (SA) node sends an electrical impulse across both atria
3. This causes the atria to contract (systole) - blood travels from atria to ventricles
4. The electrical impulse travels from the SA node towards the atrio-ventricular (AV) node
5. This causes both ventricles to contract (systole) - blood travels towards the aorta and pulmonary artery

• The alternate expansion and contraction of the arteries

• The force the blood exerts against the wall of a blood vessel

• Nicotine increases heart rate
• Carbon monoxide reduces energy levels
• Other chemicals such as tar increase likely hood of blood clots or lung cancer

• High fatty foods cause cholesterol which can block blood vessels and lead to stroke
• High intake of salt increases blood pressure

• Exercise strengthens the heart which improves overall circulation of blood