Emergence of the Animal Kingdom Or “Rise of the Chordates” Phylum Chordata Leading to Subphylum Vertebrata Chordates include the following Fish Reptiles Amphibians Birds Mammals Chordates 4 characteristics notochord support postanal tail pharyngeal gill slits dorsal hollow nerve cord
Emergence of the Animal Emergence of the Animal Kingdom Kingdom Or “Rise of the Chordates” Phylum Chordata Leading to Subphylum Vertebrata Chordates include the following: 1. 1. Fish Fish 2. 2. Reptiles Reptiles 3. 3. Amphibians Amphibians 4. 4. Birds Birds 5. 5. Mammals Mammals Chordates Chordates – 4 characteristics 1. notochord - support 2. post-anal tail 3. pharyngeal gill slits 4. dorsal hollow nerve cord Chordate Characteristics Gills in Humans! – check it out Tunicates are Chordates! Sea Squirts • sponge like - filter feeder • larva free swimming, bilateral with all Chordate traits • Lancets (a primitive fish like organism) closely resembles the idealized chordate. – The notochord, dorsal nerve cord, numerous gill slits, and post-anal tail all persist in the adult Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings “Ontogency Recapituates Evolution” Evolution Playing out in Fetus… (all these Chordates (birds, mammals, reptiles, fish, have strikingly similar Embryonic Development) Chp 33 – Rise of the Mammals • Definition of a Mammal: 1. Homoeothermic – meaning that mammals produce their own body heat 2. Mammary tissue - for the production of Milk 3. Hair Follicles - for the production of Hair 4. Generally, internal fertilization and harboring of young, however, this is only a generality because not all young are “cooked” to term internally. [...]... Order of Class Mammalia Monotremes eg The Platypus, which has a BILL, lays EGGS, but still has mammary glands and produces MILK for young This suggests a relationship between REPTILES, BIRDS and mammals Imagine that? Marsupials – eg The Kangaroo, which is a non-placental mammal Here, the development of the young is very complex, and a baby kangaroo is born very “uncooked”, and must crawl into the mother’s... Internal Fertilization development of young to a highly Advanced stage The Placenta is Key In Mammals, all the Major Body Systems are online and advanced Skeletal System Muscular System Advanced Circulatory System Respiratory System Nervous System is online and advanced! Excretory System – ooo look, Kidneys! Endocrine System – Controls you Hormones Lots of Mammals in the Simpsons Lastly, we can Learn... Endocrine System – Controls you Hormones Lots of Mammals in the Simpsons Lastly, we can Learn Important Lessons from Mammals like Homer This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers This is a completely free site and requires no registration Please visit and I hope it will help in your teaching . Emergence of the Animal Emergence of the Animal Kingdom Kingdom Or “Rise of the Chordates” Phylum Chordata Leading to Subphylum Vertebrata Chordates include the following: 1. 1. Fish Fish 2. 2. Reptiles Reptiles 3. 3. Amphibians Amphibians 4. 4. Birds Birds 5. 5. Mammals Mammals . mammals produce their own body heat 2. Mammary tissue - for the production of Milk 3. Hair Follicles - for the production of Hair 4. Generally, internal fertilization and harboring of young, however,. Marsupials – eg. The Kangaroo, which is a non-placental mammal. Here, the development of the young is very complex, and a baby kangaroo is born very “uncooked”, and must crawl into the mother’s pouch