This document provides an overview of invertebrates and contains questions about their key systems and characteristics. It asks the reader to fill in blanks about nutrition, circulatory, excretory, nervous, and reproductive systems. Questions also cover sexual and asexual reproduction, characteristics of the animal kingdom, labeling parts of animals and explaining their feeding and reproduction. Further questions address cnidarian reproduction, drawing and classifying cnidarians, classifying other animals, defining molluscs and arthropod groups, and providing examples of parasitic animals, animals with cnidocytes, exoskeletons, segmented bodies, and cephalothoraxes.

1. INVERTEBRATES REVIEW
1. Fill in the blanks:
a. ……………………... function is the ability of the living things to get materials from the
environment to get …………………. from them and to build up their own bodies.
b. To perform nutrition the animals develop the next systems: ……………………,
…………………………………, ……………………………...., ..............................................
c. The circulatory system helps the animals to carry ……..., CO2, ……………………… and
nutrients.
d. The …………………………… system helps the animals to get rid of the
………………………………………………………….
e. The O2 is needed in order to get …………………………. from the nutrients.
f. ………………………………. is the ability to feel changes in the environment or
……………………….. and to produce appropriate ……………………….
g. The systems and organs needed in the process of interaction are:
h. Reproduction is the ……………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………………….
2. Explain the differences between sexual and asexual reproduction.
3. Explain the general characteristics of the animal kingdom.
4. Name the animal and label the parts that you can recognize. Explain the way of feeding
and reproduction of these animals.
5. Explain the ways of reproduction in Cnidarians.
6. Make a drawing with the main parts of a cnidarian. Explain the two types of cnidarian
according to their body shape.
7. Classify the next animals and write their main characteristics.

2. 8. Name and define the different types of molluscs.
9. Write the fundamental characteristics of arthropods.
10. Define: direct and indirect development, bilateral symmetry, radial symmetry. Write
examples of animals in every case.
11. Name and define the different groups of arthropods.
12. Explain the ambulacral system of arthropods. What is this system for?
13. Write two examples of:
a. Parasitic animals:
b. Animals with cnidocytes:
c. Animals with exoskeleton:
d. Animals with segmented bodies:
e. Animals with cephalothorax: