The Circulatory

System!!!!!

• http://kidshealth.org/kid/htbw/CSmovie.html?tracking=81347_A

What is it?

The organ system the circulates blood throughout the body

What does circulate mean?To move or flow in a circle

Functions of The Circulatory System

1. Blood Cells carry energy/glucose (from food person eats) and Oxygen (that person breathes in) to cells all over the body

2. Blood takes Carbon Dioxide and other waste out of cells

We all know that oxygen is the key to living. It's in the air you breathe, in your lungs and in your blood. What you might not know is how oxygen gets into your blood and how the blood carries oxygen through your body.

How does the oxygen get in the blood?

• You breathe air in through your nose and mouth. It then makes its way into your lungs . Oxygen then sticks to red blood cells as they pass through the lungs on their path throughout the body - now the oxygen is in the blood.

How does energy/glucose from food get into you blood?

Glucose: is the main sugar found in blood, taken from the food we eat.

Once almost fully digested, food moves through the intestines, the nutrients are absorbed through the walls of the intestines and put into the blood.

3 Parts of Circulatory System1. Heart2. Blood vessels3. Blood

3 Parts of Circulatory System1. The heart pumps the blood.2. The blood vessels are tubes that carry blood.3. The blood carries oxygen & nutrients to body

cells.

HEART: Muscular organ that pumps

blood all around the body.

http://www.bostonscientific.com/templatedata/imports/HTML/CRM/heart/interact_6.html

Parts of the Circulatory System

The Heart

The heart has 4 chambers (sections)

Remember Functions of Circulatory System?

• Blood carries Oxygen to parts of the body

• The lungs work with the heart to do this

Blood with oxygen in it is shown as redBlood without oxygen is shown as blue

Red = blood has oxygen in itBlue= blood without oxygen

Blood Flow Visual

• http://www.bostonscientific.com/templatedata/imports/HTML/CRM/heart/interact_5.html

Blood Flow Steps

Step 1. Blood returns to your heart from your body and lungs

Oxygen-poor blood from your body flows into your right atrium.

At the same time, oxygen-rich blood from your lungs flows into your left atrium.

• Step 2. Blood flows from the upper to the lower chambers.– Blood flows from your right atrium into your

right ventricle.– At the same time, blood flows from your left

atrium into your left ventricle.

Step 3.Blood is pumped

back out to your lungs and body.– Your right ventricle

pumps blood out of your heart to your lungs, where the blood's oxygen supply is replenished.

– At the same time, your left ventricle pumps blood — once again full of oxygen — out of your heart to your body.

To lungsFor oxygen

To body

Blood Flow Poster

Task: create a poster on 8x11 paper explaining how blood flows between the heart, lungs and body

Exit1. Which of the following is not a function of the

circulatory system?A. Take oxygen to cellsB. Remove carbon dioxide from cellsC. Take energy to cellsD. Rake water to cells

2. Name the 1 of the 3 parts of the circulatory system

Thursday Warm Up

1.

Thursday

Textbook 66B for Heart Foldable

1. Label each chamber on the outside

BLOOD VESSELS: Blood travels through yourbody in hollow tubes calledblood vessels.

–There are 3 types of blood vessels: arteries, veins, capillaries

Parts of the Circulatory System

Arteries

• A artery is a blood vessel that carries oxygenated blood away from the heart.

• Biggest type of blood vessel

Veins

• A blood vessel that carries blood back to the heart.

Capillaries

• A narrow blood vessel that connects arteries with veins.

BLOOD: Special tissue that carriesimportant gases andnutrients to and from allparts of your body.

–Made up of 3 different types of cells that sit in a liquid called plasma

Parts of the Circulatory System

Plasma

• The liquid that makes up blood. Carries minerals and waste.

• About 60% of blood is plasma.

Red Blood Cells

• Blood cells that pick up oxygen and transport oxygen throughout the body.

• Hemoglobin is the compound that makes these cells red.

White Blood Cells

• Blood cells that help your body fight infections

Platelets

• Cell fragments that help to form clots when a blood vessel is damaged.