Who wrote the book of love? An introduction to your cardiovascular system.

Who wrote the book of love?

Who wrote the book of love?

An introduction to your cardiovascular systemAn introduction to your cardiovascular system

Functions of the CV System

Functions of the CV System

» Carries needed substances to cells

» Carries waste products away from cells

» Carries needed substances to cells

» Carries waste products away from cells

What does the CV system transport?

What does the CV system transport?

» Carried by blood» Oxygen from lungs to body cells» Sugar to cells to produce energy

» Waste Products» Picks up CO2 waste from cells» Carries to the lungs to be exhaled

» Disease Fighters» Transports cells that attack disease-causing

microorganisms

» Carried by blood» Oxygen from lungs to body cells» Sugar to cells to produce energy

» Waste Products» Picks up CO2 waste from cells» Carries to the lungs to be exhaled

» Disease Fighters» Transports cells that attack disease-causing

microorganisms

The HeartThe Heart» A hollow, muscular

organ that pumps blood throughout the body

» About the size of your fist, center of chest

» When the heart beats, blood is pushed through blood vessels

» A hollow, muscular organ that pumps blood throughout the body

» About the size of your fist, center of chest

» When the heart beats, blood is pushed through blood vessels

The Heart’s StructureThe Heart’s Structure

» Atrium: Upper Chamber» Receives blood that comes into the heart

» Ventricle: Lower Chamber» Pumps blood out of heart

» Valves: Flaps of tissue that prevent blood from flowing backward.

» Atrium: Upper Chamber» Receives blood that comes into the heart

» Ventricle: Lower Chamber» Pumps blood out of heart

» Valves: Flaps of tissue that prevent blood from flowing backward.

How the Heart WorksHow the Heart Works

» 2 phases

» Relaxed: when heart relaxes it fills with blood.

» Contracts: when heart contracts if pumps blood forward

» 2 phases

» Relaxed: when heart relaxes it fills with blood.

» Contracts: when heart contracts if pumps blood forward

VesselsVessels

» After leaving the heart, blood travels in vessels through the body.

» 3 kinds of vessels1. Arteries: blood carried away from

heart.2. Capillaries: tiny vessels where

substances are exchanged between blood and body cells.

3. Veins: carry blood back to the heart.

» After leaving the heart, blood travels in vessels through the body.

» 3 kinds of vessels1. Arteries: blood carried away from

heart.2. Capillaries: tiny vessels where

substances are exchanged between blood and body cells.

3. Veins: carry blood back to the heart.

Where Does the Blood Go?Where Does the Blood Go?» 2 loops» Loop One:

» To the lungs and back to the heart

» Loop Two:» To the body and

back to the heart

» 2 loops» Loop One:

» To the lungs and back to the heart

» Loop Two:» To the body and

back to the heart

The Blood’s Winding

Road

The Blood’s Winding

Road

» The average human has about 60,000 miles of blood vessels in their body.

» The average human has about 60,000 miles of blood vessels in their body.

BloodBlood

» Made up of 4 components1. Plasma2. Red Blood Cells3. White Blood Cells4. Platelets

» Made up of 4 components1. Plasma2. Red Blood Cells3. White Blood Cells4. Platelets

PlasmaPlasma» Carries molecules that come from

the break-down of digested food.» About 10% of plasma

» Water» About 90% of plasma

» Carries molecules that come from the break-down of digested food.» About 10% of plasma

» Water» About 90% of plasma

Red Blood CellsRed Blood Cells» Produced in bone

marrow» Take up oxygen in the

lungs and deliver it to cells in the body.

» Made of mostly hemoglobin» Oxygen carrier

» Produced in bone marrow

» Take up oxygen in the lungs and deliver it to cells in the body.

» Made of mostly hemoglobin» Oxygen carrier

White Blood CellsWhite Blood Cells» Produced in bone

marrow» The body’s disease

fighters» WBC’s fewer in

number than RBC’s

» Produced in bone marrow

» The body’s disease fighters

» WBC’s fewer in number than RBC’s

PlateletsPlatelets» Cell fragments that

play an important part in forming blood clots.

» Heal wounds

» Helps prevent infection and loss of blood.

» Cell fragments that play an important part in forming blood clots.

» Heal wounds

» Helps prevent infection and loss of blood.

Blood TypesBlood Types

» Four different types:» A, B, AB, and O» Type determined by markers on

the RBC’s

» Universal Donor: Type O» Universal Receiver: Type AB

» Four different types:» A, B, AB, and O» Type determined by markers on

the RBC’s

» Universal Donor: Type O» Universal Receiver: Type AB

Cardiovascular HealthCardiovascular Health» CV Disease» Atherosclerosis:

artery wall thickens» May lead to heart

attack

» Heart Attack: when blood flow to part of the heart is blocked.

» CV Disease» Atherosclerosis:

artery wall thickens» May lead to heart

attack

» Heart Attack: when blood flow to part of the heart is blocked.

HypertensionHypertension» High blood pressure

» Can damage heart and arteries

» High blood pressure» Can damage heart and arteries

Staying HealthyStaying Healthy

» Regular exercise

» Balance Diet

» Avoid Smoking

» Regular exercise

» Balance Diet

» Avoid Smoking