3.3 the heart

3.3 The heart
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Slide 1: Slide
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This lesson contains 12 slides, with text slides.

time-iconLesson duration is: 30 min

Items in this lesson

3.3 The heart

Slide 1 - Slide

Planning for today + learning goals

  • Option:
3.3 alone or with teacher (10 min)
  • Practice 3.3 (15 min)
  • Quiz (10 min)

Learning goals:
  1. You can name the parts of the heart with their features and functions
  2. You can name the blood vessels that come and go from the heart.

Slide 2 - Slide

Slide 3 - Slide

Location of the heart

Slide 4 - Slide

The heart
-The heart is a double pump

-right side pumps oxygen poor
  blood to the lungs

-left side pumps oxygen rich 
  blood to the rest of the body.

Right side
Left side

Slide 5 - Slide

Structure of the heart
The heart is a hollow muscle.

Coronary arteries (red arteries) supply Oxygen rich blood + nutrients to the heart

Coronary veins (blue veins) carry Carbon dioxide + waste products away from the heart. 

Slide 6 - Slide

The heart has four chambers:
- Left atrium
- Right atrium
- Left ventricle
- Right ventricle

Blood always enters the heart via the atria.

Septum: a wall separating the left and right side of the heart.

Slide 7 - Slide

*Superior vena cava: Oxygen-poor blood from head + arms to right atrium

*Inferior vena cava: Oxygen-poor blood from torso + legs to right atrium

*Pulmonary veins: Oxygen-rich blood from lungs to left atrium 

*Aorta: Pumps Oxygen-rich blood to rest of the body

Slide 8 - Slide

Slide 9 - Slide

atrioventricular valves
*Atria + ventricles separated by atrioventricular valves.

*Semilunar valves keep blood from flowing back into ventricles.

As you can see, a valve only opens in one direction

Slide 10 - Slide

cardiac cycle
- atria contract, blood flows into 
   ventricles (ventricles relaxed)

- ventricles contract, blood 
   flows into aorta and pulmonary 
   artery (atria relaxed)

- Heart relaxes, blood flows 
   into atria 

Slide 11 - Slide

Now you try!

Read 3.3
Make ex. 1, 2, 3, 5, 7
Page 195
Check if you made all the homework:

3.1: 2, 3, 4, 6
3.2: 1, 2, 3, 6, 7, 8

Make test yourself 3.3

Slide 12 - Slide