Circulatory System

Circulatory System

Body Systems

The main function of the circulatory system is to pump blood through the body.

Another name for circulatory is cardiovascular. Cardio = Heart

Vascular = veins.

The heart is a muscle. A very powerful special muscle that pumps blood through our bodies. The heart is the size of a human fist.

Heart

• The heart is similar to a pump or two pumps in one.

• The movement of blood through the heart and around the body is called circulation.

• It takes your heart 60 seconds to pump blood to every cell in your body.

Study the parts of the Heart. You will be asked to label them.

Multiple Choice

White blood cells ____________

• defend your body

• carry oxygen

• are sick

Blood Vessel

Blood vessels transport blood to your body. There are two types of blood vessels; arteries and veins.

Arteries

Arteries carry blood AWAY from the heart. A good way to remember this is that the word artery/arteries start with the letter A just like the word Away.

Veins

Veins carry blood without oxygen towards the heart.

Multiple Choice

Arteries carry blood with oxygen_______ from the heart.

• away

• towards

Multiple Choice

Veins carry blood without oxygen __________ the heart.

• away

• towards

Multiple Choice

Arteries carry blood ________oxygen making them red.

• with

• without

Multiple Choice

Veins carry blood _________ oxygen making them blue.

• with

• without

Why is blood so important?

• Your body needs a steady supply of blood. Blood carries OXYGEN.

• This oxygen is transported to other cells.

• To stay alive, a person needs healthy living cells.

How do you keep your heart Healthy?

• Remember that your heart is a muscle. If you want it to be strong, you need to exercise it. How do you do it? By being active in a way that gets you huffing and puffing, like jumping rope, dancing, or playing basketball.

• Try to eat at least five servings of fruits and vegetables each day. Avoid sugary soft drinks and fruit drinks.

• Try to be active every day for at least 30 minutes! An hour would be even better for your heart! Eat a variety of healthy foods and avoid foods high in unhealthy fats, such as saturated fats and trans fats (reading food labels can help you figure out if your favorite snacks contain these unhealthy ingredients).

Red Blood Cells

Red blood cells are blood cells that carry oxygen to different parts of your body.

White Blood Cells

White blood cells fight off infections and germs. These white blood cells race to an injury and form an army to help fight the germs that may get into the body due to the injury.

Multiple Choice

Red Blood cells carry _________ to the rest of your body.

• oxygen

• blood without oxygen

Let's Check our Heart!

• You can calculate your pulse to see how many beats your heart is beating in 1 minute (60 seconds).

• You will LIGHTLY press on the skin where there is a large artery.

• The best places are on the side of your neck and the inside of your wrist just below the thumb.

• You should feel a small beat under your skin.

Each beat is caused by the squeezing of your heart. Remember that your heart is like a pump. It will squeeze and release.

If you want to find your heart rate, you will need a watch with a second hand or a timer. You will have to find your pulse and count how many beats you feel in 60 seconds (1 minute).

Open Ended

How many beats did your heart beat in 60 seconds?

When you run around a lot, your body needs more oxygen-filled blood. Your heart will pump faster to send this blood to different cells.

Multiple Choice

What is the heart?

• robot

• computer

• muscle

• pump

Open Ended

What can you do to keep your heart healthy?

Open Ended

Why is the circulatory system so important?

Open Ended

How does the respiratory system and circulatory system work together?

Study the parts of the heart to label next.

Multiple Choice

What is name for #1?

• Right Atrium

• Left Atrium

• Left Ventricle

• Aorta

Multiple Choice

What is #2 called?

• left atrium

• right atrium

Multiple Choice

What is #3 called?

• left atrium

• left ventricle

• right atrium

• aorta

Multiple Choice

What is #4 called?

• left ventricle

• left atrium

• pulmonary artery

• aorta

Multiple Choice

What is #5 called?

• left atrium

• pulumaonary artery

• aorta

• ventricle