Kirjaudu sisään lähettääksesi tämän lomakkeen
Find words from the text and complete the glossary on the next page. Use a dictionary if needed.
Animals are broken down into two types: vertebrates and invertebrates.
Animals without a backbone are invertebrates and they make up approximately 95% of all animals. There are different types of invertebrates, but they all share a few characteristics. They have many cells that work together. Most, but not all, have tissues, cells that work together in a more complex way and most, but not all, can move. They generally have soft bodies. There are over one million species of invertebrates in the world. Some examples are clams, earthworms, insects, leeches, snails, spiders and squids.
Animals with a backbone are vertebrates. Vertebrates are further broken down into five classes: amphibians, birds, fish, mammals, and reptiles.
Amphibians need moist environments or water to survive. They absorb water and breathe through their thin skin. Examples of amphibians are frogs, newts and toads.
Birds are also vertebrates. Not all birds can fly, but they do all have wings and beaks that help them catch and swallow food. There are more than 11,000 bird species. Five bird species common in Finland are the chaffinch, wood pigeon, blackbird, magpie and Eurasian jackdaw.
Fish also belong to vertebrates. They are ectothermic, or cold-blooded, which means they rely on their surroundings to regulate their body temperature. Fish have fins and most, but not all, have bodies covered in scales and breathe through gills.
Mammals are endothermic, or warm-blooded vertebrates. Baby mammals drink their mother's milk for food, and nearly all mammalian species give birth to live offspring. There are over 5,500 living species of mammals all over the world.
The final type of vertebrate is the reptile. Reptiles lay eggs to reproduce. They breathe through lungs and their bodies are covered in scales or scutes. Different species of reptiles can be tiny or huge. Some examples are crocodiles, geckos, lizards, turtles, snakes and tortoises.
eläin(laji) -
etana -
evä -
harakka -
iilimato -
jälkeläiset -
kastemato -
kidukset -
maakilpikonna -
kudos -
käärme -
merikilpikonna -
mustarastas -
mustekala (kalmari) -
naakka -
nisäkäs -
nokka -
peippo -
rupikonna -
sammakko -
sammakkoeläin -
selkärangaton eläin -
selkärankainen eläin -
simpukka -
sisilisko -
suomu -
sepelkyyhky -
vesilisko -
Kirjaudu sisään lähettääksesi tämän lomakkeen