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Crayfish
| Question | Answer |
|---|---|
| Domain, Kingdom, Phylum, Subphylum of Crayfish | D:Eukarya K:Animalia P:Arthropoda SP:Crustacea |
| What does Arthropd literally mean? What is a trait that all arthropods possess? | Arthropd literally means "jointed foot" All arthropods possess jointed appendages such as legs and antennae |
| What type of skeleton do arthropods have? 3 functions of this? | Exoskeleton Structure, support, repel water |
| Tough polysaccharide that comprises an arthropod's skeleton? | chitin |
| Disadvantage of exoskeleton on an arthropod? How do they deal with this? What is this process scientifically called? | Exoskeleton limits growth. Arthropods will shed their exoskeleton and create a new one. Scientifically called molting. |
| What is cephalization? | Cephalization is the concentration of sensory and brain structures/tissues at the anterior end |
| How is the Phylum Arthropoda broken into the 5 subphyla? | Based on differences in mouth parts |
| 3 segments of arthropod ant-post | head, thorax, abdomen |
| What is the head and thorax segments together called? | cephalothorax |
| T or F: Arthropods have a true coelom | True |
| T or F: Arthropods have an open circulatory system | True |
| T or F: Arthropods have simple eyes | False; compound eyes |
| T or F: Arthropods have a dorsal nerve cord | False; ventral nerve cord |
| What does an open circulatory system mean? | The blood flows through several large vessels then enters spaces within the body, "bathing" the organs instead of flowing through veins and arteries. |
| What Order are crayfish classified into? What does this literally mean? | Decapoda Oder "5 pairs"/ "10 feet" |
| What are the external structure differences between male and female crayfish? | Male has thicker and longer 1st pair of swimmerets/ can point towards thorax female has thinner and shorter 1st pair of swimmerets/ wispy |
| What are the internal structure differences between male and female crayfish? | females have eggs or a red mass males have think white bodies |
| Cheliped: Location Function | Location- thorax Function- to catch and break up food/ for fighting |
| Antennae: Location Function | Location- head Function- to help taste and touch senses |
| Walking Leg: Location Function | Location- thorax Function- to walk over solid surfaces |
| Antennule: Location Function | Location- head Function- for equilibrium (balance)/ aids touch and taste |
| Uropod: Location Function | Location- abdomen Function- for rapid backward movement |
| Telson: Location Function | Location- abdomen Function- for rapid backward movement |
| Maxillae: Location Function | Location- head Function- aids chewing/ move water past gills for respiration |
| Maxilliped: Location Function | Location- thorax Function- holding and breaking up food/ passing food to maxillae |
| Swimmerets: Location Function | Location- abdomen Function- creates water currents to guide sperm to female (male)/ holds eggs while they develop (female) |
| Carapace: Location Function | Location- cephalothorax Function- covers dorsal surface of head and thorax |
| What type of symmetry do arthropods have? | bilateral |
| What will happen if a crayfish has a cheliped torn off in a fight? | It can regenerate- leaving the crayfish with different sized chelipeds |
| Compound eye function What does the name mean | light sensory/ sends nerve impulses to brain many lenses |
| Cervical groove function | separates he head form the thorax |
| Rostrum function | protects the compound eyes |
| Esophagus function and system | - leads food from mouth to stomach - digestive |
| Gills function and system | - allows oxygen to diffuse across surface - respiratory |
| Intestine function and system | - to absorb nutrients - digestive |
| Flexor Muscles function and system | - to bend abdomen - part of abdomen (no muscular sys) |
| Extensor Muscles function and system | - to straighten abdomen - part of abdomen (no muscular sys) |
| Ventral Nerve Cord function and system | - connects series of ganglia/ carries brain impulses - nervous |
| Green Glands function and system | - to eliminate cellular waste, excess water - excretory |
| Stomach function and system | - grinds food into fine paste - digestive |
| Heart function and system | - pumps hemolymph to vessels - circulatory |
| Testes function and system | - produces sperm -reproductive |
| Ovaries function and system | - produces eggs -reproductive |
| Ganglia function and system | - receives nerve impulses -nervous |
| Digestive Glands function and system | - excretes enzymes that mix with food paste - digestive |
| Anus function and system | - excretes solid waste - digestive |
| General traits of Arthropoda Phylum | -bilateral symmetry -jointed appendages -exoskeleton - free moving -high degree of cephalization -compound eyes - (sometimes) segmented antennae - open circulatory system - molting -true ceolom - |
| Crayfish scientific name | Cambarus affinis |
| Crayfish:digestive glands::humans:______________ | liver |
| Crayfish:green glands::humans:_______________ | kidneys |
| Which way do flexor muscles run? | horizontally/ side-to-to/ across the body |
| Which way do extensor muscles run? | vertically/ up and down |
| Spider:chelicerae::crayfish:____________ | mandible |
| What is a defining characteristic of a black widow | the red hourglass shape on the ventral surface of their abdomen |
| What is a defining characteristic of a brown recluse | the violin shape on the dorsal surface of their cephalothorax |
| If bitten by a black widow, 10% of the population will experience____________ ______________ | breathing probelms |
| If bitten by a brown recluse, 20% experience ________ _________ appear Was is this? | necrotic skin the skin will be eaten away and look like craters |
| What type of environment does a crayfish live in? (hypertonic or hypotonic) What does this mean is constantly happening to the cells? | Hypotonic water is constantly entering the cells of the crayfish |
| Advantage of having so many sensory hairs at the posterior end | Allows crayfish to better sense vibrations and chemicals in their environment. They act as the antennae and antennules of the post. end |
| What is the general term for a group of terrestrial crustaceans? What is an example of one? | Isopods pill bugs/ roly poly |
| Why are the largest crustaceans only found in aquatic environments? | Their large shells make it harder to move on land. Water allows them more movement bc bouyancy makes objects feel lighter than when out of water. |
| What does hexapod mean? | 6 legs (insects) |
| What does myriapod mean? | many legs (centipedes and milipedes) |
| Bee therapy is used mainly for what autoimmune disease? | multiple sclerosis |
| What is apitherapy? | using any bee product to get better |
Created by:
IsabellaRamsey