CardiovascularCardiovascularSystemSystem

CardiovascularCardiovascular System System

� Cardio = “heart”Cardio = “heart”� Vascular = “vessels”Vascular = “vessels”

Circulatory (Circulatory (Cardiovascular)Cardiovascular) System System

� Made up of Made up of heartheart, , vesselsvessels, and , and bloodblood

Three Types of Blood VesselsThree Types of Blood Vessels

� ArteriesArteries - move - move blood blood away fromaway from the heartthe heart

Three Types of Blood VesselsThree Types of Blood Vessels

� Arteries - move blood Arteries - move blood away from the heartaway from the heart

� VeinsVeins - move blood - move blood towardtoward the heart the heart

Three Types of Blood VesselsThree Types of Blood Vessels

� Arteries - move blood away from the heartArteries - move blood away from the heart� Veins - move blood toward the heartVeins - move blood toward the heart� CapillariesCapillaries - -

tiny blood tiny blood vessels that connect vessels that connect arteriesarteries and and veinsveins

Functions of the BloodFunctions of the Blood

� Carries Carries oxygenoxygen from from lungslungs to to all body all body cellscells and removes and removes carbon dioxidecarbon dioxide from the from the cellscells

Red blood cellWhite blood cell

Functions of the BloodFunctions of the Blood

� Red blood cells – contain hemoglobin which combines with oxygen. These cells deliver oxygen to the body.

� Their disc shape helps them squeeze through vessels.

� They wear out and are replaced every four months. New red blood cells are produced in the bone marrow.

Red blood cell

Functions of the BloodFunctions of the Blood

� Carries Carries wastewaste products of cell activity to the products of cell activity to the kidneyskidneys to be removed from the body to be removed from the body

Functions of the BloodFunctions of the Blood

� Transports Transports nutrients nutrients from the from the digestivedigestive system to body system to body cellscells

Functions of the BloodFunctions of the Blood

� Materials in the blood help fight Materials in the blood help fight infectioninfection and and healheal wounds ( wounds (white white blood cells and blood cells and plateletsplatelets).).

White blood cell: fights foreign invaders

Platelets: help blood form clots

Functions of the BloodFunctions of the Blood

� White blood cells – are generally larger than red blood cells. They can move out of your blood through the capillary walls into tissue fluid and lymph.

� They then travel around fighting disease. The white blood cells last 13–20 days, after which they are destroyed by the lymphatic system.

White blood cell: fights foreign invaders

Functions of the BloodFunctions of the Blood

� Platelets – are irregularly-shaped, colorless bodies that wear out within 5–10 days

� Their sticky surface lets them, along with calcium, vitamin K, and fibrinogen, form clots to stop bleeding.

Platelets: help blood form clots

Which two substances does the blood Which two substances does the blood transport away from body cells? transport away from body cells?

1.1. Oxygen & carbon Oxygen & carbon dioxidedioxide

2.2. Carbon dioxide & Carbon dioxide & wastewaste

3.3. Nutrients & wasteNutrients & waste4.4. Oxygen & nutrientsOxygen & nutrients

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What parts of the blood help fight off What parts of the blood help fight off disease and heal injuries? disease and heal injuries?

1.1. White blood cells & White blood cells & plateletsplatelets

2.2. Red blood cells & Red blood cells & plateletsplatelets

3.3. White blood cells & White blood cells & red blood cellsred blood cells

4.4. White blood cells & White blood cells & plasma plasma

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Which is not a function of the circulatory Which is not a function of the circulatory system?system?

1.1. Carry nutrients & oxygen to Carry nutrients & oxygen to body cellsbody cells

2.2. Carry carbon dioxide & Carry carbon dioxide & waste away from body cellswaste away from body cells

3.3. Attack disease-causing Attack disease-causing bacteria bacteria

4.4. Produce chemicals that Produce chemicals that control body processescontrol body processes

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