Dogfish Shark Dissection Student Assignment Craig B Dante

Dogfish Shark Dissection

Student Assignment: �Craig B �Dante �Taneisha

Book assignment: �Devonte �Tyquan �Marcus �Michael L. �Kamari �Mykeyvia �Fabian

Book assignment: Mikal Moesha Terry Antwan La’Monica

Bell Ringer �Get a dissection worksheet, write your name on it, and start reading over the pre-lab questions �Take note of which lab group you will be working with today �If you do not feel comfortable doing the dissection, tell your teacher now

Agenda �Bell Ringer (5 minutes) �Introduction and Pre-lab Questions (20 minutes) �Shark Facts �Dissection Instruction Videos �Shark Dissection (30 minutes) �Clean Up (15 minutes) �Analysis/Conclusion Questions (20 minutes)

Introduction and Pre-lab Questions �You MUST complete the pre-lab questions in order to participate in the lab �Pay close attention to the instructions �This is part of your grade!

Homeostasis �What does it mean? �The body of a living organism maintaining internal balance even when there are external changes

Shark Facts �Classification: �Kingdom= Animal �Phylum= Chordata �Class= Chondrichthyes �Reproduction: sexual �Ovoviviparous= eggs are formed inside mother’s body, hatch inside her body, and are born alive

Shark Facts �Preys on fish, squid and octopus �Larger sharks are predators

Shark Facts �Lateral-line system: sensory organ that consists of cells along the sides of the body �Detects pressure changes and vibrations �Spiracle: special gill slit behind eye, takes oxygen directly to the brain

Shark Facts �Dogfish sharks move continuously…why do you think they do this? �Dogfish sharks have to move continuously so that oxygen-rich water will flow into their gills �They have no way to pump the water into their gills

Shark Facts �Ampullae of lorenzi: sense organs called electroreceptors �Can detect weak electrical signals produced by the muscle movements of other animals �Found in pores on the shark’s head

A few more shark facts… �https: //www. youtube. com/watch? v=Z 9 Bj. SHUh. XOU

Dissection Terms �Anterior= front/head �Posterior=rear/bottom �Dorsal= near the upper surface, toward the back �Ventral=near the bottom, toward the belly

Dissection Terms �Lateral= toward the side, away from the middle �Medial= toward the middle �Rostral=toward the front �Caudal=toward the tail

Dissection Demonstration �https: //www. youtube. com/watch? v=m. Rk. BXL-UI �https: //www. youtube. com/watch? v=u. Jr. T 7 l. Hg 5 Lw

Behavior Expectations �DO’S: �Follow all instructions �Stay with your group �Talk only with your group �Complete all the steps on your worksheet �DON’TS: �Misuse any materials or tools �Not read and follow instructions �Leave your lab table �Talk to people in other groups �Skip the steps on your worksheet

Behavior Expectations �You should be taking this lab seriously �Any misuse of tools or materials will result in serious consequences, this is an issue of safety �I am treating you like a mature student, you need to act like one �NOT FOLLOWING INSTRUCTIONS IN ANY WAY, NO MATTER HOW SMALL, WILL RESULT IN YOU NOT PARTICIPATING IN THE DISSECTION �MISUSE OR DAMAGING MATERIALS IN ANY WAY WILL RESULT IN A REFERRAL AND DISMISSAL FROM MY CLASS

Analysis and Conclusion Questions �Work silently and independently �Your work is due when the bell rings