1. Dogfish Shark Dissection

2. Student Assignment:
Craig B
Dante
Taneisha

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

4. Book assignment:
Mikal Moesha Terry Antwan La’Monica

5. 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

6. 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)

7. 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!

8. Homeostasis What does it mean?
The body of a living organism maintaining internal balance even when there are external changes
Give the example of our bodies maintaining a constant body temperature

9. 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

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

11. 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

12. 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

13. 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

14. A few more shark facts…

15. Dissection Terms Anterior= front/head Posterior=rear/bottom
Dorsal= near the upper surface, toward the back
Ventral=near the bottom, toward the belly
Tell kids that these terms help us to understand what directions we’re talking about

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

17. Dissection Demonstration

21. 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

22. 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
If students think they will not be able to conduct themselves maturely, they will be given the option to do an alternate assignment and sent to another teacher’s room

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