Esoma-KE Logo
Change Class  |  Change Subject

Invertebrates in Animals - Living Things | Grade 6 Science

  Change Class Grade 6 Science and Technology
Science and Technology


Click to Attempt Grade 6 Science and Technology Questions


- Invertebrates are animals without backbone.
- Animals with backbones are called vertebrates.
- Examples of invertebrates include insects such as a housefly, arachnids such as a spider, millipedes, and centipedes.


Observe the picture below of an insect:
Parts of an Insect - Science and Technology Grade 6
Parts of an Insect

Characteristics of Insects

  • Insects have six legs (three pairs)
  • Insects have three body parts (head, thorax and abdomen).
  • Insects have compound eyes.
  • Some insects like housefly have wings while others like ants have none.
  • Insects have a pair of antennae on their head.
  • Insects lay eggs.
  • Insects include: ants, housefly, locusts, butterfly.


- Examples are ticks and spiders

Characteristics of Arachnids

  • They have 8 legs, four pairs.
  • They have a soft body.
  • They do not have wings.
  • They do not have antennae.
  • They have their body divided into two: (Cephalothorax and Abdomen)
Parts of a Spider (Arachnid) - Science and Technology Grade 6
Parts of a Spider (Arachnid) - Image Courtesy of Wikipedia
1. Legs
2. Cephalothorax
3. Abdomen

Millipedes and centipedes

Characteristics of Millipedes and centipedes

- The following are some characteristics of millipedes and centipedes.
  • They have many legs.
  • They have segmented bodies.
  • They have antennae.
  • They have hard outer cover.
  • Millipedes have two pair of legs per segment.
  • Centipedes have one pair of legs in a segment.
A Millipede - Science and Technology Grade 6
A Millipede
A Centipede - Science and Technology Grade 6
A Centipede - Image Courtesy of Texas A&M University

Note: Centipedes can bite and sting which can cause the skin to turn red due to their venom.

Importance of invertebrates to human beings

  1. Insects are used to pass pollen grains from one flower to another.
  2. Some insects such as bees provide honey which is food for human beings.
  3. Millipede and centipede are important in soil formation. They also help to aerate the soil.
  4. Insects such as silkworm produce silk used in making clothes

Explore More Grade 6 Science and Technology Topics

User Reviews: Share Your Feedback!

Hello Esoma-KE Member, please help review these notes.    Why review

Your review has been successfully submitted.
Tell us what you think about the notes.

Submit Comment

Students' and Teachers' Reviews

Here's what our users had to say ...

Guest User