Chapter 7: Introduction to animals Lesson 7.3 : Chordates

Lesson 7.3 EQ: What characteristics do chordates have in common? Learning Objectives: Success Criteria: Identify describe the characteristics of chordates. Compare and contrast vertebrates and invertebrate chordates Vocabulary: notochord, pharyngeal pouch, gill, Complete lab book page 72 Complete foldable venn diagram.

Warm-up: COMPARE THE TWO ANIMALS? Look at the pictures : Similarities Differences

What is a chordate: Chordates are animals that are grouped in the phylum Chordata. There are two types of Chordates – Vertebrate chordates and invertebrate chordates

PHYLUM CHORDATA-INVERTEBRATES LANCELETS AND TUNICATES

Characteristics of chordates: All chordates have four traits in common : Notochord A tail A nerve cord Pharyneal pouches

PHYLUM CHORDATA- VERTEBRATES Fish, amphibians, reptiles, birds, mammals

Members of Phylum Chordata THAT have a backbone (are vertebrates).

Members of Phylum Chordata THAT DO NOT HAVE backbone (are Invertebrates).

Group work :reading activity Silent reading– SB page 266. Paragraph 2 – 3 traits of chordates. Complete identify and describe questions in LB-page 72. Draw and label a diagram of chordate and the 4 traits (see figure 13 page 267) in your note book .

Foldable: Outside COMPARE AND CONTRAST (pg. 266) Invertebrate Chordates Both Vertebrate Chordates CHORDATE Definition: (pg. 266)

WRAP UP ! Homework : Summarize it! [SB page 273 questions 1/2. Page 274 SB, questions 4/5/7

Lesson 7.3 EQ: How do the groups of vertebrate chordates differ? Learning Objectives: Success Criteria: Name 5 groups of vertebrate chordates. Distinguish between the identifying characteristics of vertebrate chordates Vocabulary: amnion, ectotherm, endotherm , mammary gland. Name 5 groups of vertebrate chordates. Distinguish between the identifying characteristics of vertebrate

WARM UP Review homework questions from previous lesson . Page 274 questions 4/5/7

Vertebrate : Groups of fish PG 268 SB Jawless Sharks and rays Bony fish Jawless fish such as lampreys. They are parasites on other fish. Fish whose skeletons are made of cartilage, such as sharks, rays, and skates. Includes fish whose skeletons are made of bone

Vertebrate : Groups of AMPHIBIANS PG 269 SB Frogs and toads Salamanders and Newts Caecilians Frogs and toads do not have tails . They have long legs that enable them to jump. They have tails and move by bending their bodies side-to- side. Do not have legs. They look similar to a earthworms and move by twisting their bodies back and forth.

More about amphibians Amphibians are a group of tetrapod's that live on land. The word amphibians means ‘both ways of life’. Most amphibians lay their eggs in water ( aquatic fertilization). Young amphibians such as tadpoles live in water. Adult amphibian lungs are strong and can breath on land. However amphibians must live in moist habitats to keep there bodies from drying out.

Vertebrate : Groups of reptiles PG 270 SB Three common groups of reptiles Turtles Alligators and crocodiles Lizards and snakes Most reptiles live on land and all have lungs for breathing. Scales on their skin to prevent them from drying out. Reptiles lay eggs. Inside the egg is a amnion, a protective membrane that surrounds the embryo. Ectotherms – animals that heat their bodies from heat in their environments.

Vertebrate : birds PG 271 SB. Birds have wings and feathers for flight. Birds have bones that are nearly hallow and filled with air. Birds are endotherms , animals that generate their body heat from the inside. Birds lay eggs. Inside the egg is a amnion, a protective membrane that surrounds the embryo.

Vertebrate : Groups of mammals PG 272 SB Mammals are animals with hair or fur. Females have mammary glands to nurse their young with milk. Monotherms Marsupils Placental mammals Mammals that lay eggs. Examples : platypus and echidna Mammals that raise their young's in pouches . Examples : kangaroos Mammals that have a structure called a placenta that the young are attached to as they grow inside the mother.

STATIONS – VERTEBRATE CHORDATES Stations activity – 5 types of vertebrate chordates. Rotate to each station using their lab books (page 73) to record key information. Complete identify and describe questions in LB on page 72. Print slides 15 to 20 and use as stations.

Complete Page 277 sb

WRAP UP Homework : Review page 274, question 6 Standardized test practice. Page 280, question 5