Respiration in Sharks Outline Shark definition Shark physical

Respiration in Sharks

Outline Shark definition Shark physical characteristics Shark Respiratory system Respiration by Gills References

Outline Shark definition Shark physical characteristics Shark Respiratory system Respiration by Gills References

Shark definition Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton , five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays

Outline Shark definition Shark physical characteristics Shark Respiratory system Respiration by Gills References

Shark physical characteristics There are more than 400 shark species in the ocean, but they all have the same basic anatomy. This astonishing anatomy masterfully designed by evolution is what sets sharks apart from other types of aquatic life including whales and dolphins

Shark physical characteristics There are seven anatomic characteristics of sharks: 1. Cartilage Skeleton. 2. Skin covered with dermal denticles. 3. Powerful Jaws. 4. Efficient Liver. 5. Anatomic Tail. 6. Dynamic Fins. 7. Highly Developed Senses.

Shark physical characteristics

Outline Shark definition Shark physical characteristics Shark Respiratory system Respiration by Gills References

Shark Respiratory system Like other fishes, sharks breathe by extracting oxygen when seawater pass through their gills. Shark gills are just behind the shark head, and they do not have covers like most fish. The water passes through the gills when sharks are swimming making impossible for most of them to stay still otherwise they would drown. This process is called ram ventilation.

Shark Respiratory system

Outline Shark definition Shark physical characteristics Shark Respiratory system Respiration by Gills References

Respiration by Gills The direction in which the blood flows is always opposite to that of the water. This allows the maximum amount of oxygen to pass from the water to the blood and is called the "counter current flow". Movement is necessary for breathing as well as buoyancy. Therefore, the condition of the muscles is of utmost importance to the respiration and the very survival of the shark.

Respiration by Gills

Outline Shark definition Shark physical characteristics Shark Respiratory system Respiration by Gills References

References www. presentationszone. com www. sharks-world. com www. wikibedia. org www. sharksinfo. com http: //respiratoryandmusculatoryyoshi. weebly. com