1) I can label a diagram of my heart (A)

2) I can describe how my blood is transported from my heart to my cells and back again (M)

Finished? Try and estimate how many times your heart will beat if you live to be 80 years old…

Wednesday, April 19, 2023Do now:Write today’s date and copy today’s learning / kaupapa:

Do now:Your heart beats, on average, 70 times per minute1) How many time does it beat per hour?

70 x 60 = 4,200 beats2) How many times does it beat per day?

4,200 x 24 = 100,800 beats3) How many times does it beat per year?

100,800 x 365 = 36,792,000 beats4) Humans live on average for 80 years: how many

times will your heart beat?36,792,000 x 80 = 2.943 BILLION beats!!!

Wednesday, April 19, 2023

Will beat nearly 3 billion times in a lifetime

Will pump over 200 million litres of blood

That’s 200 full-size Olympic swimming pools!

Your blood vessels would stretch around the world twice

But it only takes your heart 20 seconds to pump blood to every cell in your body...

and yet your heart is smaller than your fist...

Videos:

1) The Circulatory Rap – then diagram

2) Bill Nye – then heart structure

Watch the rap song again... and then:

1) draw a diagram that shows what the circulatory system does2)your diagram must include the following words:

heart lungs

veins arteries

cells

oxygen carbon dioxide

Did you know?

• There is one muscle in your body that is vital for your survival...

• The heart is an involuntary muscle. • This means it works on its own without us

having to think about making it beat.

your heart!

Heart Jigsaw:

• The heart has four different hollow areas called chambers

• There are two chambers on each side of the heart

• The heart is actually two pumps in one:

• The right side receives blood from the body and pumps it to the lungs to get oxygen

• The left side receives the oxygenated blood from the lungs and pumps it around the body

Watch the rap song again... and then:

1) write down what the circulatory

system does

2)your answer must include the following words:

heart lungs

veins arteries

cells

oxygen carbon dioxide

Merit Answer:

1. The heart pumps blood in arteries, carrying oxygen and nutrients to our cells to keep us alive

2. The heart pumps blood carrying carbon dioxide in veins away from these cells back to the lungs to get rid of the CO2 and get fresh O2

1) The circulatory system pumps blood carrying oxygen and nutrients around the body

2) The heart receives blood from the lungs with fresh oxygen

3) The heart then pumps this blood out of its arteries to deliver oxygen and nutrients to all the body’s cells

4) The cells convert the oxygen and nutrients in to energy via respiration, but produces carbon dioxide as a waste-product

5) This “de-oxygenated” blood is returned to the lungs by veins, and the lungs then “re-oxygenate” the blood for another cycle

Excellence Answer:

FIRST deoxygenated blood is returned to the heart from the body in the large vein called the VENA CAVAThe blood arrives into the RIGHT ATRIUM before passing through the TRICUSPID VALVE into the RIGHT VENTRICLEIn order for the deoxygenated blood to get oxygen it needs to travel to the LUNGS. It is carried in the PULMONARY ARTERYThe PULMONORY VEIN carries blood from the LUNGS back to the LEFT ATRIUM of the HEARTFrom the ATRIUM the oxygenated blood goes through the BICUSPID VALVE to the LEFT VENTRICLEThe wall of the LEFT VENTRICLE is thick and muscular as it has to pump the oxygenated blood out into the AORTAThe AORTA is the main artery in the body and it carries blood out to the ORGANS and TISSUES of the bodyWhen the oxygen has been used from the blood in the cells, carbon dioxide and waste products are returned to the blood. This generally happens in the CAPILLARIESThe blue blood is then collected from the capillaries and passes into the thin walled VEINS around the body

Answer these TRUE or FALSE questions in your books:

1) Blood vessels that carry blood into the heart are called arteries

2) The heart is a muscle

3) Veins carry “oxygenated” blood

4) Human cells convert CO2 into energy and produce O2 as a by-product

FALSE – Arteries Away from the heart

TRUE

FALSE – why?

FALSE – other way around

Wednesday, April 19, 2023Do now: