Download lesson-2-1-the-heart

Lesson Starter
1. Copy and complete:
Cells  ___________  ___________  Organ systems  Organisms
2. List the organ systems you can think of
3. What 3 components make up the circulatory system?
The Heart
•Muscular
•Blood, Nerve, Muscle
tissue
•Pumps blood around
body
The Heart
• https://www.twig-world.com/film/heart976/
Questions..
1) How big is the heart (roughly)?
2) Roughly how many times does the heart
beat each day?
3) How many chambers does the heart have?
4) Why is one side of the heart shown to be
blue and one shown to be red?
5) Why is one side of the heart thicker than
the other?
6) What causes the sound of the heart beat?
Heart Dissection
• https://www.twig-world.com/experiment/dissection-heart-4179/0
The heart
• Flipped
• 4 Chambers
• Atrium collect
blood
• Ventricles contract
and pump blood
• Cardiac muscle
Right
Atrium
Right
Ventricle
Left
Atrium
Left
Ventricle
The Heart (copy)
• The upper chambers are the right
and left atria these collect blood.
• The lower chambers are the right
and left ventricles, these pump
blood.
• The wall of the heart is made of
cardiac muscle.
The Heart
Part of the Heart
Function
Vena Cava
Carries deoxygenated blood to the
heart
Pulmonary Artery
Carries blood from right ventricle to
lungs
Aorta
The main artery of the body,
supplying oxygenated blood to the
circulatory system
Pulmonary Vein
Receive oxygenated blood from the
lungs
The Heart
Heart Valves (copy)
• Valves in the heart prevent the backflow of blood to
ensure blood keeps circulating.
Quiz..
Throw the ball, asking a question about
the blood and heart; last person standing
is the winner.
You must be able to answer the question
you ask..