Homework Help is Here – Start Your Trial Now!
Science
Biology
9. Locate the 1st pair of walking legs or periopods. These are called the chelipeds (the claws). Gently manipulate the cheliped to determine the direction in which the appendage can bend. How many joints are there on a single cheliped? 10. Cut the end of the cheliped off and use the forceps to find the connective tissue inside. Pulling on this tissue will make the claw open and close. Try it! 11. Behind the cheliped are four more pairs of walking legs. Remove one of these and compare them to the cheliped. How many joints are on each walking leg? isds 12. Locate the swimmerets or pleiopods. Are the swimmerets jointed? How many pairs of swimmerets are there?

9. Locate the 1st pair of walking legs or periopods. These are called the chelipeds (the claws). Gently manipulate the cheliped to determine the direction in which the appendage can bend. How many joints are there on a single cheliped? 10. Cut the end of the cheliped off and use the forceps to find the connective tissue inside. Pulling on this tissue will make the claw open and close. Try it! 11. Behind the cheliped are four more pairs of walking legs. Remove one of these and compare them to the cheliped. How many joints are on each walking leg? isds 12. Locate the swimmerets or pleiopods. Are the swimmerets jointed? How many pairs of swimmerets are there?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
See similar textbooks
icon
Related questions
Question
Please fill the blanks
(intel 9. Locate the 1st pair of walking legs or periopods. These are called the chelipeds (the claws). Gently manipulate the cheliped to determine the direction in which the appendage can bend. How many joints are there on a single cheliped? 10. Cut the end of the cheliped off and use the forceps to find the connective tissue inside. Pulling on this tissue will make the claw open and close. Try it! 11. Behind the cheliped are four more pairs of walking legs. Remove one of these and compare them to the cheliped. How many joints are on each walking leg? tib enego aboqontinto sld 12. Locate the swimmerets or pleiopods. Are the swimmerets jointed? How many pairs of swimmerets are there? 13. The last segment of the abdomen (the 7th segment) is called the telson, and it is specialized for swimming. Locate the two uropods extend from either side of the telson. Craynsh 14. Look at the first pair of swimmerets on your crayfish. If these swimmerets are considerably larger and stiffer than the other swimmerets, you have a male. If the first swimmerets are about the same size as the others, your crayfish is a female. What is the sex of your crayfish? 15. Carefully insert the point of the scissors under the top of the carapace (shell) at the back of the cephalothorax and cut up the middle to the rostrum. Gently split and peel away the carapace being careful not to remove any internal tissues 16. Note the exposed gills. (Feathery like structures just under the carapace you just removed) 17. The two light colored masses extending on each side of the body into the head is the digestive glands (hepatopancreatic glands). In between these masses, just behind where the rostrum used to be is a large, thin-walled stomach. It may be filled with the crayfish's last meal. Open the stomach and observe the contents. If empty, you may be able to see three small brown "bumps". These are known as the gastric mill and are used to physical grind the food inside of the stomach. 18. Just posterior to the stomach is a very small heart. Carefully remove the heart and observe it under a dissecting scope. You may want to place it in a petri dish of water. Can you see the ostia? Page | 307
Transcribed Image Text:(intel 9. Locate the 1st pair of walking legs or periopods. These are called the chelipeds (the claws). Gently manipulate the cheliped to determine the direction in which the appendage can bend. How many joints are there on a single cheliped? 10. Cut the end of the cheliped off and use the forceps to find the connective tissue inside. Pulling on this tissue will make the claw open and close. Try it! 11. Behind the cheliped are four more pairs of walking legs. Remove one of these and compare them to the cheliped. How many joints are on each walking leg? tib enego aboqontinto sld 12. Locate the swimmerets or pleiopods. Are the swimmerets jointed? How many pairs of swimmerets are there? 13. The last segment of the abdomen (the 7th segment) is called the telson, and it is specialized for swimming. Locate the two uropods extend from either side of the telson. Craynsh 14. Look at the first pair of swimmerets on your crayfish. If these swimmerets are considerably larger and stiffer than the other swimmerets, you have a male. If the first swimmerets are about the same size as the others, your crayfish is a female. What is the sex of your crayfish? 15. Carefully insert the point of the scissors under the top of the carapace (shell) at the back of the cephalothorax and cut up the middle to the rostrum. Gently split and peel away the carapace being careful not to remove any internal tissues 16. Note the exposed gills. (Feathery like structures just under the carapace you just removed) 17. The two light colored masses extending on each side of the body into the head is the digestive glands (hepatopancreatic glands). In between these masses, just behind where the rostrum used to be is a large, thin-walled stomach. It may be filled with the crayfish's last meal. Open the stomach and observe the contents. If empty, you may be able to see three small brown "bumps". These are known as the gastric mill and are used to physical grind the food inside of the stomach. 18. Just posterior to the stomach is a very small heart. Carefully remove the heart and observe it under a dissecting scope. You may want to place it in a petri dish of water. Can you see the ostia? Page | 307
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Substance abuse
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education
SEE MORE TEXTBOOKS