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Circulatory System - PowerPoint PPT Presentation


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Circulatory System. Function. Carries oxygen, nutrients, and wastes throughout the body. Blood Vessels. Arteries carries blood from the heart to tissues of the body Capillaries smallest of the blood vessels, walls are only 1cell thick, real work done here Veins

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Presentation Transcript
function
Function
  • Carries oxygen, nutrients, and wastes throughout the body
blood vessels
Blood Vessels
  • Arteries

carries blood from the heart to tissues of the body

  • Capillaries

smallest of the blood vessels, walls are only 1cell thick, real work done here

  • Veins

returns blood to the heart

slide4

Vessels

Section 37-1

Vein

Artery

Capillary

Oxygenated Blood

Deoxygenated Blood

heart
Heart
  • Divided into 2 sections (pumps)

1. Pulmonary circulation: right side, pumps from the heart to the lungs

oxygen poor blood

2. Systematic circulation: oxygen-rich blood, Flows in left side of heart then to the body with oxygen

valves
Valves
  • Found between atria and ventricles
  • Prevent blood from flowing back into the heart
  • Also pulmonary valves and one on the aorta
blood flow through the heart
Blood Flow through the Heart!

Lungs

7

2

3

4

5

6

1

8

Your BODY

a song
A Song????
  • "Pumps your Blood" by Anson Williams
high blood pressure
High Blood Pressure
  • Pulse: systolic= force felt in the arteries when the ventricles contract

Diastolic= force felt in the arteries when the ventricles relax

  • AKA: Hypertension
  • Forces the heart to work harder, which may weaken or damage the heart muscle
  • Increases the risk for heart attack or stoke
heart attack
Heart Attack
  • Arteriosclerosis=blocked arteries
  • Part of the heart muscle may die due to lack of oxygen
  • Symptoms: nausea, shortness of breath, and severe crushing chest pain
  • Treated with drugs to increase blood flow to the heart, saving cells
stroke
Stroke
  • Blood clots as a result of arteriosclerosis break free and get stuck in the vessels leading to part of the brain
  • Brain cells die due to lack of oxygen
  • Can also occur in weakened artery in the brain that bursts