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1. Characteristics of the Animal kingdom - Coggle Diagram
1. Characteristics of the Animal kingdom
Very diverse kingdom, all share many characteristics:
Most are
motile
and can actively
move
about.
Extremely
sensitive
to environmental changes.
Heterotrophic
(feed on other living things or their remains).
Most have an internal or external
skeleton
.
Composed of
eukaryotic
cells.
Live in aquatic and terrestrial environments (everywhere).
Multicellular
with differentiated tissues and organs.
How are animals classified?
Simplest way to classify animals is based on the presence or absence of a spinal column or backbone:
Invertebrates
Don't have a spinal column (backbone), like butterflies and sea urchins.
Vertebrates
Have a spinal column (backbone) like cats and frogs.
Animal symmetry
Animal's internal organs, are often arranged asymmetrically.
Except sponges, all animals are divided in two types of symmetry:
Radial symmetry
Parts arranged around a central point.
Symmetry found in organisms that are sessile, float or move very little.
Invertebrates like starfish and sea anemones.
Bilateral symmetry
An imaginary line drawn along the body would diveded it into two parts.
Parts would be mirror images of each other.
This symmetry facilities greater mobility.
More complex structural organization.
Insects and vertebrates.
Symmetry
refers to the shape of an animal's body and how the parts are arranged.
Nutrition
They can be classified according to the source of their food:
Herbivores
(eat plants or algae).
Omnivores
(eat animals and plants).
Carnivores
(eat other animals).
Feeding behaviour (comportamiento alimentario) can be divided into five groups.
Detritivores
Feed on organic matter in sediments.
Sea cucumbers and earthworms.
Parasites
Feed on a living host's nutrients and cells. Rarely kill their host directly.
Mosquitoes and leeches.
Scavengers
Feed on dead bodies of other animals.
Vultures, hyenas and many insects larvae.
Filter feeders
Feed on small particles and organisms suspended in water.
Bivalves, sponges and whales.
Predators
Feed on animals that they hunt and capture using their teeth, tentacles and poison.
Insects and most vertebrate animals.
