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Crayfish External Anatomy Read the definitions below then label the crayfish diagram. Crayfish lobsters spiders and insects.
Apologia Biology Module 13 Diagrams part 3.
Diagram of a crayfish. As shown in the diagram its body is divided into two main parts the cephalothorax and the abdomen. The cephalothorax consists of. Internal anatomy of a crayfish.
Edible freshwater crustacean with pincers on the two The body of a scorpion is divided into two parts. The cephalothorax alsointernal anatomy. The diagram below displays the crayfish with the carapace carefully removed exposing the underlying gills and other organs.
Crayfish External Anatomy Read the definitions below then label the crayfish diagram. Abdomen - The abdomen is the segmented tail area. The swimmerets telson and uropods are attached to the abdomen.
Carapace - The protective shell exoskeleton of the cephalothorax. The Crayfish is a crustacean. As a bonus site members have access to a banner-ad-free version of the site with print-friendly pages.
Read the definitions below then label the crayfish diagram. Start studying Diagram of a crayfish. Learn vocabulary terms and more with flashcards games and other study tools.
Read the definitions below then label the crayfish diagram. Abdomen - The abdomen is the segmented tail area. The swimmerets telson and uropods are attached to the abdomen.
Carapace - The protective shell exoskeleton of the cephalothorax. Cephalic groove - An indentation in the carapace between the head region and the thorax region. The crayfish has 8 jointed walking legs a segmented body 2 pairs of sensory antennae and compound eyes.
It has 2 large pincers or claws called chelipeds. If a crayfish loses a leg the leg will regenerate regrow. The head and thorax are fused forming the cephalothorax.
Using gills a crayfish breathes oxygen that is dissolved in water. As shown in the diagram below the crayfish body is divided into two main parts. The cephalothorax consists of the cephalic or head region and the thoracic region.
The rostrum is the most anterior part of the cephalic region of the cephalothorax and will form what is commonly known as the brow ridge. Biology of Freshwater Crayfish Blackwell Science. A Reassessment of the Conservation Status of Crayfishes of the United States and Canada after 10 Years of Increased Awareness.
Online resources NCWRC website Dr. Jim Fetzner Carnegie MNH Original descriptions. Crayfish any of numerous crustaceans constituting the families Astacidae Parastacidae and Austroastracidae.
They are closely related to the lobster. Over half of the more than 500 species occur in North America. Nearly all live in fresh water although a few species occur in brackish water or salt water.
Use the diagram once again to locate and identify the organs of the reproductive system. The animal shown in the diagram is a male crayfish. If your specimen is a male locate the testis.
The testis is the long white organ under the heart and a bit forward. The sperm ducts that carry sperm from the testis open at the fifth walking leg. Place a crayfish on its side in a dissection tray.
Use the diagram below to locate the cephalothorax and the abdomen. The carapace a shield of chitin covers the dorsal surface of the cephalothorax. On the carapace observe an indentation the cervical groove that extends across the midregion and separates the head and thoracic regions.
On the thoracic region locate the prominent suture or indentation on. Browse 4592 crayfish stock photos and images available or search for crayfish party or signal crayfish to find more great stock photos and pictures. Boiled crawfish with lemon on ice - crayfish stock pictures royalty-free photos images.
Crayfish have eyes are on stalks and can move independently. Crayfish walk in a forward motion but they use a backward motion when they swim allowing them to move more rapidly. Crayfish have eyes are on stalks and can move independently.
Planaria Diagram 15p Image Quiz. Year 3 Week 15 Timeline 8p Image Quiz. Starfish Sea star Water.
-crayfish are omnivores and feed on a wide variety of animal and plant materials-crayfish commonly have life spans of 2 - 6 years-some crayfish spend most of their lives in lakes ponds or streams-other crayfish spend most of their lives in burrows crayfish basics. Crayfish like it dark and cool and during much of the daylight they will be found alone withdrawn under a rock or a clump of vegetation waiting for dark at which time they come out to forage for food. Crayfish are omnivorous eating just about anything they can find or catch dead or alive.
Internal Anatomy of the Crayfish Directions. Follow the directions step-by-step locating each of the structures in the order they appear in the directions. You may want to review or reference terms you dont remember It is expected that you know the terms.
Cephalothorax thorax rostrum and dorsal before you start this dissection. These appendages are used for locomotion when the crayfish is on land or moving on the bottom of the lake or river in which it lives. Crayfish lobsters spiders and insects.
Apologia Biology Module 13 Diagrams part 3.