Biology Unit 3: The circulatory system

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

The circulatory system: basics 2

1. Read EVERYTHING!

2. answer the questions. 

3. Take notes and write down the blue words!

Circulation

The human circulatory system:

 heart + blood vessels. 

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

Closed circulatory system: Most blood remains inside the blood vessels during transport

Circulation

-Red blood indicates blood 

  with a lot of oxygen

-Blue blood indicates blood 

  with a lot of carbondioxide

(Not really blue in real life)

The heart

-The heart is a double pump

-right side pumps oxygen poor

  blood into the pulmonary 

  circulation 

-left side pumps oxygen rich 

  blood into the systemic 

  circulation 

Right side

Left side

2 different circulations:

Pulmonary circulation

Right side heart --> lungs --> left side heart

Systemic circulation

Left side heart --> rest of body --> right side heart

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

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

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

Which one is the shortest circulation?

1. Pulmonary
2. Systemic

	From	To
Artery
Vein

Heart

Heart

Organ

Organ

Put the texts underneath the corresponding picture.

Cardiac pause - heart fills with blood

Atria contract

Cardiac pause - heart fills even more with blood

Ventricles contract

Blood flows into arteries

Now you try!

Make exercise 8 and 9 in your paper or online book (you can reach this one from someday or magister)

If done: finish exercise 1, 2, 3, 4 and 6 from 3.1 Blood.