Phylum Chordata

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by amelliarenea
Last updated 5 years ago

Discipline:
Science
Subject:
Zoology
Grade:
10

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Phylum Chordata

Amellia & Tiffany

Sharks, such as the tiger and white sharks are the most formidable marine predators (carnivores). They also include large filter feeders such as the manta ray, whale shark and basking shark.

Chondrichthyes fish are a group of vertebrates that includes sharks, rays, skates and chimaeras.

General Information

Phylum:ChordataClass:Chondrichthyes

Feeding

Sharks have a closed circulation system i.e. blood flows only within blood vessels.

Circulation

Cartilaginous fishes excrete urea as nitrogen waste.

Fertilization is internal. Development is usually live birth (ovoviviparous species) but can be through eggs (oviparous). Some rare species are viviparous. There is no parental care after birth; however, some do guard their eggs.

Reproduction

Excretion

Chondrichthyes fish/sharks have a skeleton that consists of cartilage. The cartilage is both tough and flexible and it supports growth. Many have two dorsal fins; some cartilaginous spines lying in front of the dorsal fins.

Body Structure

They breathe through gills.

Respiration


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