Amphibians: Characteristics and Examples

Insects have an ______ covering called exoskeleton

Arthropods and insects use ______, lungs, and skin for respiration

Mollusks like snails and slugs belong to the phylum ______

Exoskeleton provides protection and support for arthropods like ______

The respiratory organs of arachnids are called ______

Insects, arthropods, and mollusks all have ______ body temperature

Arthropods have a ________ level of organisation.

The body of arthropods is covered by a ________ exoskeleton.

Respiratory organs in arthropods can be ________, book gills, book lungs or tracheal system.

Arthropods are ________ symmetrical animals.

Insects belong to the phylum ________.

Excretion in arthropods takes place through ________ tubules.

Members of Platyhelminthes exhibit organ level organisation where tissues are grouped together to form organs, each specialised for a particular function. In higher phyla like Annelids, ______________, organs have associated to form functional systems.

In animals like Annelids, Arthropods, Mollusks, Echinoderms, and Chordates, organs have associated to form functional systems, each system concerned with a specific physiological function. This pattern is called ______________ level of organisation.

The digestive system in Platyhelminthes has only a single opening to the outside of the body that serves as both mouth and anus, and is hence called ______________.

A complete digestive system has two openings, mouth and ______________.

The circulatory system may be of two types: open type and closed type. In the closed type, the blood is circulated through a series of vessels of varying diameters like arteries, veins, and ______________.

Animals can be categorised on the basis of their symmetry. Sponges are mostly asymmetrical, any plane that passes through the centre does not divide them into equal halves. In contrast, some animals exhibit ______________ symmetry.