Human Circulatory System (II)
TOPIC: Human Circulatory System (Continued)
SUBTOPIC: Blood Vessels and Circulation of Blood
CLASS: Primary 6
DATE: ____________________
PERIOD: ____________________
DURATION: 40 minutes
LEARNING OBJECTIVES
By the end of this lesson, pupils should be able to:
- Identify the main blood vessels in the human body.
- Differentiate between arteries, veins, and capillaries.
- Describe how blood circulates in the body.
- Draw and label a diagram of blood vessels.
KEY VOCABULARY WORDS
- Artery
- Vein
- Capillary
- Circulation
- Oxygenated blood
- Deoxygenated blood
INSTRUCTIONAL MATERIALS
- Chart of blood circulation
- Drawing of arteries, veins, and capillaries
- Real-life demonstration (feeling pulse at the wrist)
INTRODUCTORY ACTIVITY
Teacher asks pupils to place two fingers on their wrist or neck to feel the pulse. Teacher explains: “That is blood moving through your arteries.”
CONTENT OF LESSON
Blood Vessels
Blood vessels are tiny tubes in our body that carry blood to every part — from your head to your toes!
There are three main types of blood vessels:
- Arteries
- Carry blood away from the heart
- This blood is rich in oxygen
- Example: The artery that carries blood to your brain
- Veins
- Bring blood back to the heart
- This blood has less oxygen because it has been used by the body
- Example: Veins in your arms and legs
- Capillaries
- Very tiny blood vessels
- They connect arteries to veins
- They help in the exchange of oxygen, carbon dioxide, and nutrients with body cells
Circulation of Blood
The movement of blood around the body is called blood circulation. It’s like a loop that never stops!
Here’s how it works:
- The lungs give oxygen to the blood.
- The heart pumps this oxygen-rich blood through arteries to the body.
- Capillaries deliver oxygen and nutrients to body cells and collect waste (like carbon dioxide).
- The veins carry the used (deoxygenated) blood back to the heart.
- The heart sends the blood to the lungs to get fresh oxygen again.
And then the cycle continues!
CLASS EXERCISE 1
- Name the three types of blood vessels.
- State one difference between arteries and veins.
- What is the function of capillaries?
CLASS EXERCISE 2
Fill in the blanks:
- Blood vessels are ______ that carry blood.
- Arteries carry blood ______ the heart.
- Veins carry blood ______ the heart.
- Capillaries connect ______ and ______.
- The movement of blood in the body is called ______.
CLASS EXERCISE 3
Draw a simple diagram showing how blood flows from the heart → arteries → capillaries → veins → heart.
ASSIGNMENT (MULTIPLE-CHOICE QUESTIONS)
- Which vessel carries blood away from the heart? (a) Artery (b) Vein (c) Capillary (d) Nerve
- Blood rich in oxygen is called (a) deoxygenated (b) oxygenated (c) waste blood (d) empty blood
- The tiny vessels for exchange of gases are (a) Arteries (b) Veins (c) Capillaries (d) Bones
- Circulation of blood means (a) storage of blood (b) movement of blood (c) colour of blood (d) temperature of blood
- The blood vessel that carries blood back to the heart is (a) Artery (b) Vein (c) Capillary (d) Trachea