Fish Family Tree…<br /><ul><li>Simplest vertebrates
Largest group of vertebrates</li></li></ul><li>Characteristics:<br />Ectothermic: temp controlled by surroundings<br />Fins: for moving/steering<br />Scales: cover and protect body<br />Lateral line: row of tiny sense organs along the body; detects vibrations<br />
Circulatory System<br />Closed circulatory system with 2 heart chambers <br /> a.) ATRIUM<br /> 1.) Collects blood from body<br /> b.) VENTRICLE<br /> 1.) Pumps blood to gills then body<br />
Respiratory System<br />A. Gills <br /> a.) exchange carbon dioxide and oxygen from water<br />
A. Jawless fish<br />A. Characteristics<br />Skeleton of cartilage<br />No scales, jaws, teeth<br />Long slimy tube body<br />Ex: Lamprey and Hagfish<br />
Warm up<br />What does ectothermic mean?<br />What does endothermic mean?<br />
B. Cartilage fish <br />A. Characteristics<br />Skeleton made of cartilage<br />Excellent senses-sight and smell<br />Store oil in liver to float<br />Cannot stop swimming or will suffocate!<br />Examples are sharks, skates, and rays<br />
C. Bony fish<br />A. Characteristics <br /> 1.) Skeleton of bone<br /> 2.) Swim bladder to float<br /> 3.) Three groups<br /> a.) Lobed - Heavy jaws and limblike fins <br /> b.) Lung - Gills and lungs<br /> c.) Ray-finned - Thin bony spines called rays connected by thin skin<br />
Fish Buoyancy…<br />Look at the 2 balloons.<br />Describe what you see happening and determine which represents the bony fish and which represents the cartilage fish. Be prepared to explain your conclusion.<br />
Text check…<br /><ul><li>Find the 2 questions you wrote down after reading chapter 3 section 1.
Turn to your neighbor and discuss these questions.
If you know the answers or understand them now, write an explanation.
If you are still confused, raise your hand and I will come around and explain.</li>