3.2 the circulatory system P1

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• Middelbare school
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• Leerjaar 2

U3: the circulatory system P1

Planning for today + learning goals

• Lookback 3.1 (5 min)
• 3.2 the circulatory system (15 min)
• Practice 3.2 (15 min)

Learning goals:

1. You can distinguish between the pulmonary and systemic circulation.
2. You can name three types of blood vessels with their features and functions.

Which part of the blood makes pathogens harmless?

One of the substances that tobacco smoke contains is carbon monoxide. In the blood, carbon monoxide takes up the sites where oxygen is normally held.

When skin is damaged, it clots the blood to form a

Red blood cell

White blood cell

Platelets

Blood plasma

Red blood cells

White blood cells

Platelets

Circulation

The human circulatory system:

 heart + blood vessels. 

The path taken through the body by the blood is called circulation.

-Red blood indicates oxygen-rich blood.

-Blue blood indicates oxygen-poor blood.

(Not really blue in real life)

The heart

-The heart is a double pump

-right side pumps oxygen-poor

  blood to the lungs.

-left side pumps oxygen-rich 

  blood into the rest of the body.

Right side

Left side

2 different circulations:

Humans have a double circulatory system: blood flows through the heart 2 times per circuit.

Left side

Right side

Pulmonary circulation

Right side of the heart pumps blood to the lungs. (Oxygen poor)

Here the blood picks up Oxygen and drops of Carbon dioxide. 

--> blood goes to left side of the heart (Oxygen rich)

Right side

Left side

Systemic circulation

Left side of the heart pumps blood to every part of your body. (Oxygen rich)

 

Drops off: oxygen and nutrients to cells

 Picks up: Carbon dioxide and other waste products from cells

Blood goes back to right side of the heart (Oxygen poor)

 

Right side

Left side

Bloodvessels

3 types of blood vessels:

• Arteries,
  
• Capilleries,
• Veins.

The heart pumps blood through the blood vessels.

The names are often based on the organ they come from or go to.

Arteries

Transports blood away from the heart

Oxygen-rich blood

Thick walls

Usually deep in the body

Veins

Transports blood to the heart

Oxygen-poor blood

Thinner walls

Valves

valves

capillaries 

Network of capillaries in all organs

Much thinner than a hair.

capillaries 

Walls only one cell layer

Only here substances can travel through the wall (gas Exchange)

White blood cells

Now you try!

Read 3.2 

Make ex. 1,2,3,4,7,8 

Which one picks up Oxygen?

1. White blood cells
2. Red blood cells
3. Platelets

What is the pigment called that allows red blood cells to absorb Oxygen?

1. Haemoglobin
2. Thrombosis
3. Fibrinogen
4. Blood plasma

Which one is the shortest circulation?

1. Pulmonary
2. Systemic