Kingdom Animalia Characteristics:
- All animals are multicellular, eukaryotic heterotrophs —they have multiple cells with mitochondria and they rely on other organisms for their nourishment.
- Adult animals develop from embryos: small masses of unspecialized cells.
- Simple animals can regenerate or grow back missing parts.
- Most animals ingest their food and then digest it in some kind of internal cavity.
- Somewhere around 9 or 10 million species of animals inhabit earth.
- About 800,000 species have been identified.
- Organisms that live rooted to one spot are sessile and those that move around are motile. Even the most sessile animals can move at lease some part of their bodies. This movement is depends on how animals obtain food.
- The most primitive animals are asymmetrical. Cnidarians and echinoderms are radially symmetrical. Most animals are bilaterally symmetrical.
Phylum Porifera: Sponges
Habitat: Most of them live in salt water but, they can also live in fresh water.
Exoskeleton: They have exoskeletons made up
of spicules or spongins in the body wall.
Respiratory Organs: They don’t have respiratory organs.
They breathe by absorbing oxygen through exchange
between their tissue and water.
Locomotion: They don’t have anything that help them move.
Heart: No heart.
Aortic Arch: No aortic arch.
Mode of Reproduction: Reproduce sexually and asexually.
Fertilization: They fertilize internally.
Habitat: Most of them live in salt water but, they can also live in fresh water.
Exoskeleton: They have exoskeletons made up
of spicules or spongins in the body wall.
Respiratory Organs: They don’t have respiratory organs.
They breathe by absorbing oxygen through exchange
between their tissue and water.
Locomotion: They don’t have anything that help them move.
Heart: No heart.
Aortic Arch: No aortic arch.
Mode of Reproduction: Reproduce sexually and asexually.
Fertilization: They fertilize internally.
Phylum Cnidaria: Jellyfish, Coral, Sea Anemones)
Habitat: Found in fresh and salt water. Mostly salt water.
Exoskeleton: They do not have an exoskeleton nor any shell
or bone to protect them.
Respiratory Organs: No respiratory organs.
Locomotion: They use their tentacles for locomotion.
Heart: Doesn’t have a heart.
Aortic Arch: Doesn’t have an aortic arch.
Mode of Reproduction: Both asexually and sexually.
Fertilization: They fertilize externally.
Habitat: Found in fresh and salt water. Mostly salt water.
Exoskeleton: They do not have an exoskeleton nor any shell
or bone to protect them.
Respiratory Organs: No respiratory organs.
Locomotion: They use their tentacles for locomotion.
Heart: Doesn’t have a heart.
Aortic Arch: Doesn’t have an aortic arch.
Mode of Reproduction: Both asexually and sexually.
Fertilization: They fertilize externally.
Phylum Mollusca: Snails,Slugs, Octopus
Habitat: Mollusks live in fresh, salt water and are also terrestrial organisms. Exoskeleton: The exoskeleton of a mollusk for example is the shell on a snail. They have soft bodies and the shell is there to protect it. Respiratory Organs: The organs are; gills (for the ones that reside in water, and for the ones that live on land), siphons, mantle cavity. Locomotion: They move because of a muscle called foot. Heart: A mollusk does have a heart. Aortic Arch: A mollusk has an aortic arch. Mode of Reproduction: They only reproduce sexually. Fertilization: In some species the egg is fertilized inside the female, but in most species the egg is released from the female and fertilized externally |
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