science 3.1 knp

The Circulatory SystemChapter 3 Section 1

How is your circulatory system like the plumbing in a house?

Materials move through your body via the….


CIRCULATORY SYSTEM


heart, blood vessels, and blood

CIRCULATORY SYSTEM

Moving…

Moving…Blood moves oxygen and nutrients to cells.

Moving…Blood moves oxygen and nutrients to cells.Blood carries carbon dioxide and other wastes away from the cells.

Moving…Blood moves oxygen and nutrients to cells.Blood carries carbon dioxide and other wastes away from the cells.Movement of materials into and out of your cells occurs by diffusion and active transport.

Diffusion and Active Transport

the heart

Pulmonary Circulation The flow of blood through the heart to the lungs and back to the heart. Turn to page 66 and look at Figure 3. Begin reading at the top left and then bottom left, top right and bottom right. Trace the flow of blood with you finger.

Pulmonary Circulation1. Blood, high in CO2 and low in O2 returns from the body and travels to the ________. It enters the ___________ through the ____________.

3. Oxygen rich blood, from the ____, enters the heart through the __________ and into the __________. What makes pulmonary veins special?

2. The right atrium contracts and blood enters the right __________. The ______ then contracts and sends blood to the _______ through the ___________. Why are the pulmonary arteries special?

4. The _____________ contracts and forces the blood into the left _______. Once that contracts, blood flows out of the heart and into the _________.

Pulmonary Circulation1. Blood, high in CO2 and low in O2 returns from the body and travels to the heart. It enters the right atrium through the superior and inferior vena cava.

3. Oxygen rich blood, from the lungs, enters the heart through the pulmonary vein and into the left atrium. What makes pulmonary veins special? They are the only vein that carries oxygen rich blood.

2. The right atrium contracts and blood enters the right ventricle. The ventricle then contracts and sends blood to the lungs through the pulmonary artery. Why are the pulmonary arteries special? They are the only artery that carries blood that is low in oxygen.

4. The left atrium contracts and forces the blood into the left ventricle. Once that contracts, blood flows out of the heart and into the aorta.

Systemic Circulation

Systemic Circulation Blood moves through your body (except your heart and lungs) by systemic circulation.

Systemic Circulation Blood moves through your body (except your heart and lungs) by systemic circulation.Oxygen-rich blood flows from your heart through arteries. They carry nutrients and oxygen to your body cells.

Systemic Circulation Blood moves through your body (except your heart and lungs) by systemic circulation.Oxygen-rich blood flows from your heart through arteries. They carry nutrients and oxygen to your body cells.Carbon dioxide and wastes are picked up by the blood and return, through your veins.

Blood Vessels•Arteries•Veins•Capillaries

Are you ready for a mind boggling fact??

17

Are you ready for a mind boggling fact?? If you were to take all of your blood vessels and lay them out, they would cover a distance of...

17


97,000 kilometer

17


97,000 kilometerThat’s more than 2 times around the earth!

17

Arteries

ArteriesBlood vessels that carry blood away from the heart.

ArteriesBlood vessels that carry blood away from the heart. Have thick, elastic walls made of connective tissue, smooth muscle

ArteriesBlood vessels that carry blood away from the heart. Have thick, elastic walls made of connective tissue, smooth muscleEach ventricle is attached to an artery.

ArteriesBlood vessels that carry blood away from the heart. Have thick, elastic walls made of connective tissue, smooth muscleEach ventricle is attached to an artery. The right ventricle is attached to the pulmonary artery.

ArteriesBlood vessels that carry blood away from the heart. Have thick, elastic walls made of connective tissue, smooth muscleEach ventricle is attached to an artery. The right ventricle is attached to the pulmonary artery. The left ventricle is attached to the aorta.

VeinsBlood vessels that carry blood back to the heart


Veins have one way valves that keep blood moving towards the heart


Veins have one way valves that keep blood moving towards the heart

Blood flow is helped by your skeletal muscles. When they contract, the veins are squeezed and move blood toward the heart

VeinsTwo major veins return blood to the heart. Superior vena cava returns blood from your head and neck. Inferior vena cava returns blood from your abdomen and lower body.

Capillaries

CapillariesArteries and veins are connected by capillaries.

CapillariesArteries and veins are connected by capillaries. The walls of capillaries are only one cell thick

CapillariesArteries and veins are connected by capillaries. The walls of capillaries are only one cell thickNutrient and oxygen diffuse into body cells through the thin capillary walls.

CapillariesArteries and veins are connected by capillaries. The walls of capillaries are only one cell thickNutrient and oxygen diffuse into body cells through the thin capillary walls. Wastes materials and carbon dioxide diffuse from body cells into the capillaries.

circulatory system

http://www.teachersdomain.org/resource/tdc02.sci.life.stru.circulator/

http://www.teachersdomain.org/resource/tdc02.sci.life.stru.circulator/

Blood Pressure

Blood Pressure

Blood Pressure - the force of blood on the wall of the blood vessels

Blood Pressure


Is blood pressure highest in arteries or veins?

Blood Pressure



Systolic pressure - pressure caused when the ventricles contract and blood is pushed out of the heart

Blood Pressure



Systolic pressure - pressure caused when the ventricles contract and blood is pushed out of the heart

Diastolic pressure - pressure that occurs when the ventricles fill with blood just before they contract again.

Cardiovascular Disease page 71


AtherosclerosisFatty deposits build up on arterial wallsWhat can lead to this disease? Where can this occur? Where is it most serious?



HypertensionHigh blood pressureExtra strain is placed on the heart when you have high blood pressure. The heart must _____________ to compensate for this.

What is one cause of hypertension?



HypertensionHigh blood pressureExtra strain is placed on the heart when you have high blood pressure. The heart must _____________ to compensate for this.

What is one cause of hypertension? Heart FailureThe heart cannot pump blood efficiently. It might be cause by a weakened heart muscle or heart valves not working properly.

Preventing Cardiovascular Disease

Preventing Cardiovascular DiseaseWays to prevent cardiovascular disease

Preventing Cardiovascular DiseaseWays to prevent cardiovascular diseaseRegular check ups

Preventing Cardiovascular DiseaseWays to prevent cardiovascular diseaseRegular check upsA healthy diet – choosing foods low in salt, sugar, cholesterol and saturated fats

Preventing Cardiovascular DiseaseWays to prevent cardiovascular diseaseRegular check upsA healthy diet – choosing foods low in salt, sugar, cholesterol and saturated fatsExercise

Preventing Cardiovascular DiseaseWays to prevent cardiovascular diseaseRegular check upsA healthy diet – choosing foods low in salt, sugar, cholesterol and saturated fatsExerciseNot smoking

Beating Heart Surgery

http://www.youtube.com/watch?v=Zxqj1BcBpIg&feature=fvw

http://www.youtube.com/watch?v=Zxqj1BcBpIg&feature=fvw

science 3.1 knp

Health & Medicine