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

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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:

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Keeping the RS Healthy:

Avoid Smoking

Avoid Pollution

Living with Asthma

Avoid Respiratory Infections

Get Regular Exercise

Maintain Healthy Body Weight