Video Presentation Notes-4
Function of Cardiovascular System
Delivery materials to the cells Ex.) Glucose
Carrying waste away Ex.) CO2 removal, breaks down glucose
Fighting diseaseWhite blood cells, sealing cuts and scrapes
Transmission of Blood
Blood Vessels:
Capillaries
Smallest blood vessels in the body
Oxygen and dissolved minerals diffuse through the walls
Temperature regulation
Arteries
Carry blood away from the heart
Carry oxygen rich blood
Largest – aorta
Made up of thick walls
Veins
Carry blood to the heart
Blood Pressure:
Force with which blood pushes against the walls of blood vessels
Systolic – ventricles contract
Diastolic – ventricles are relaxed
Blood Pressure Normal BP – 60/60 – 119/79
Low BP – lower than 90/60
High BP – 140/90
Prehypertension – 120/80 – 139/89
Components of Blood:
Plasma
Liquid component of blood
Carries waste products to the kidneys
Red Blood Cells
Carry oxygen from the lungs to the body
Contain hemoglobin
White Blood Cells
Fight infection
Platelets
Cell fragments for clotting
Platelets stick to the edges of cuts and form clots
Cardiovascular Diseases:
Hypertension, High Cholesterol, Heart Attack, Stroke, Heart Murmur, Arrhythmia, Opening in Heart Wall
Keeping the Heart Healthy:
Exercise
Strengthens the heart
Decrease BP
Stress level decreases
HDL Increases
Diet
Limit fried foods
Limit processed foods
Animal products
Avoid Smoking
Damages blood vessels
Blood Flow Process
The blood first enters the right atrium. The blood then flows through the tricuspid valve into the right ventricle. When the heart beats, the ventricle pushes blood through the pulmonic valve into the pulmonary artery. The pulmonary artery carries blood to the lungs where it “picks up” oxygen and then leaves the lungs to return to the heart through the pulmonary vein. The blood enters the left atrium, then descends through the mitral valve into the left ventricle. The left ventricle then pumps blood through the aortic valve and into the aorta, the artery that feeds the rest of the body through a system of blood vessels.
Blood returns to the heart from the body via two large blood vessels called the superior vena cava and the inferior vena cava. This blood carries little oxygen, as it is returning from the body where oxygen was used. The vena cava's pump blood into the right atrium and the cycle of oxygenation and transport begins all over again.
Respiratory System:
Responsible for bringing oxygen from the outside environment into body.
Removes carbon dioxide from the body.
Organs of the RS:
Cilia, Bronchus, Trachea, Lung, Pharynx, Nose, Nasal Cavities
Process of Respiration:
Keeping the RS Healthy:
Avoid Smoking
Avoid Pollution
Living with Asthma
Avoid Respiratory Infections
Get Regular Exercise
Maintain Healthy Body Weight