1 / 23

Chondrichthyse

Chondrichthyse. Alex Gosse and Zac Doucette. Phylogenetic Tree. Taxonomists: Characteristics for Animalia. Heterotrophs Multicellular usually eukaryotic motile at some point in life lack cell walls reproduce sexually. Characteristics Chordata.

jin
Download Presentation

Chondrichthyse

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chondrichthyse Alex Gosse and Zac Doucette

  2. Phylogenetic Tree

  3. Taxonomists:Characteristics for Animalia • Heterotrophs • Multicellular • usually eukaryotic • motile at some point in life • lack cell walls • reproduce sexually

  4. Characteristics Chordata • skeletal rod called Notochord, lying on the dorsal side of the body • nerve cord that lies dorsally in the body • Pharyngeal Gill slits • Digestive system, circulatory system, and nervous system are all well developed • post-anal tail • closed circulation • they reproduce sexually

  5. Characteristics for Chondrichthyse • poikilothermic (cold blooded) • swim bladder and lungs are absent • digestive systems have intestinal spiral valves (exception of Holocephali) • have a cloaca

  6. do not have bone marrow • red blood cells are produced in the spleen and special tissue around the gonads • tough skin is covered with dermal teeth (exception Holocephali, as the teeth are lost in adults) • water dwelling vertebrates with gills throughout life • limbs in the form of fins

  7. Hammerhead Shark Great White Shark Sting Ray Bonnet head Shark

  8. Spotted Eagle Ray Tiger Shark

  9. Life Cycle of The Great White Shark

  10. Delivery is in Spring or Summer. • Reproductive cycle is ovoviviparous: eggs are retained within the body of the female. • Pups hatch from egg capsules inside the mothers uterus and are born soon afterward. (live birth) • Litter sizes range from 2-17 • Leave mothers side as soon as born.

  11. The pup's jaws develop in the first month and the stronger ones eat their weaker unborn siblings. • Females mature at 3.5-4.1 m in length and 9-10 years of age • Males mature at 4-5 m in length and 14-16 years of age • After maturity they can reproduce (little is known about reproduction) • Mothers give birth at same spot every year • Life span is 30 years

  12. Anatomical Features of Shark • Their skin is rough and harsh like sand paper. Their skin is made up of dermal denticles which are minuscule placoid scales that are similar to teeth. These dermal denticles are even covered in enamel called vitro dentine, also including dentine and a pulp cavity; they are extremely comparable to teeth. • Skeletons are made of cartilage rather than bone

  13. Types of fins: pectoral, pelvic, dorsal, anal, caudal • Gills to aid in respiration. Side of its head 5-7 gill slits ( in order for gas exchange to happen correctly there must be water running over these gills at all times) • Shark spiracle (Slits located behind the eye) send blood vessel immediately to the eyes and brain of the shark.

  14. Blood circulation • Sharks have a two chambered heart with an atrium and a ventricle. The heart is an S-shaped tube that is located in the head of the shark. The blood is pumped by the heart through the afferent bronchial arteries to capillaries in the gills. The blood goes through efferent bronchial arteries then to the tissues of the body and finally back to the heart in veins.

  15. Digestion • Sharks swallow their food whole or bite it into very large pieces. They have U- shaped stomachs with acids and enzymes to dissolve what is eaten. The stomach produces a mush that enters the intestines. Only this mush can enter because of the pyloric valve is small. Indigestible things are vomited.

  16. Excrete Waste • Sharks get rid of body waste in two ways. Some waste products, such as carbon dioxide, are expelled through the gills. Other body waste is excreted through the digestive tract.

  17. Gas Exchange • Sharks extract oxygen from seawater as it passes over its gills. Unlike other fish, sharks gills lie in a row behind the head, and are not covered. Just behind the eye there is a modified slit called a spiracle. This slit helps the shark with taking in water during respiration. When the shark is moving, water passes through the mouth and over the gills, this process is called ‘ram ventilation’.

  18. Gas Exchange

  19. Interesting Facts • The word Chondrichthyse includes the latin word for cartilage which is a major feature for that taxon. • Sharks have inner ears but no outer ears. • Sharks have been around for over 300 million years.

  20. Sources • http://www.fossilmuseum.net/Tree_of_Life/PhylumChordata/ClassChondrichthyes.htm • http://www.the-shark-side-of-life.com/shark-anatomy.html • http://animaldiversity.ummz.umich.edu/accounts/Chondrichthyes/classification/ • http://www.ucmp.berkeley.edu/vertebrates/basalfish/chondrintro.html • http://animals.about.com/od/cartilaginousfishes/p/cartilaginousfishes.htm • http://www.fao.org/docrep/006/Y5261E/y5261e08.htm • http://marinebio.org/species.asp?id=38 • http://sharks101.wordpress.com/circulatory-and-respiratory-system/ • http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140763/

More Related