Fish
DANIELLE CRISE
CHRIS MENCHIO
Fish
Internal Diagram
Nervous System
Organs
Three Classes of Fish
Class Agnatha
Nickname: Jawless Fish
Examples: Lamprey, Hagfish
General Traits: Lack paired fins and bones
Lack Jaw
Attach to prey with disk shaped sucker
Hagfish Traits
Bottom dwellers
Salt water
No jaws
Tie themselves into knots- hide from predators
Lamprey Traits
Lack jaws
Sucker mouth
Feed off body fluids of prey
Live in salt and fresh water
Class Chondrichthyes
Nickname: Cartilaginous fish
Examples: Sharks, Rays, and Skates
General Traits :
Skeleton made of cartilage
Jaws
Paired fins
Predators
Internal fertilization
Shark Traits
6-20 rows of teeth
20,000 teeth in a lifetime
Lots of lipids
Well-developed sense organs
Constantly swim
Lack air bladder
Ray Traits
Flat bodies
Bottom dwellers
Long, whip-like tails
Live young
Diamond shaped bodies
Flat bodies
Bottom dwellers
Long, whip-like tails
Lay eggs
Triangular body
Skates Traits
Class Osteichthyes
Nickname: Bony fish
Examples: Trout, bass
General Traits:
Jaws
Bony skeleton
Paired fins
Ray Finned Fish Traits
Common fish
Air bladder
Scales- cycloid
Camo for protection in water
Lobe Finned Fish Traits
Lunged fish:
Gills and lungs
Shallow ponds
Coelacanth fish:
Thought to be extinct
Lack rays
Fleshy skin
Fish Adaptations for Life in
Water
External Diagram
Lateral line
Dorsal fins eye nostril
Caudal fin
Anal fin
Pectoral fin
Pelvic fin gill mouth
Adaptations
Stream-line body
Allows them to move faster through water
Muscular tail
Rapid movement
Paired Fins
Move through water
Gills
Take in O2 release CO2
Gill Structure
Adaptations Continued
Dorsal Fin
Increases stability
Secretes Mucus
Reduces friction
Lateral Line
Detects vibrations
Fins and their functions
Caudal:
For forward movement of fish
Dorsal:
Keep fish upright and stable
Anal:
Keeps fish moving in straight line
Fins and their functions continued
Pelvic:
Used for stopping and moving up and down
Pectoral:
Used for stopping and moving up and down
Scales:
Protection
Prevent loss or gain of water
Nervous System
Purpose:
Transmit electrical impulses from brain to rest of body
Brain
Spinal cord
Nerves
Sense organs
Eyes nose
Reproductive System
Purpose:
To produce viable sex cells
Bony fish:
External fertilization
Cartilaginous fish:
Internal fertilization
Digestive System Passageway
Mouth (entrance for food)
Pharynx (connects mouth to esophagus)
Esophagus ( passageway for food- leads to stomach)
Stomach ( starts digestion)
Digestive System Passageway
Pyloric ceca ( 2 nd part of digestion)
Intestine( last part of digestion)
Anus ( exit for solid waste)
Additional organs of digestion
Liver (Makes Bile)
Gall Bladder ( stores bile until needed in intestine)
Pancreas ( makes insulin)
Pathway of Blood
Circulatory System
Purpose: To deliver oxygen and food
Closed circulatory system
Low efficiency
Clean and dirty blood mixes
Pathway of blood
1.
Heart pumps blood through arteries
2.
Blood picks up O2 and releases CO2
Pathway of blood
3. Gills to body tissues- nutrients and waste are exchanged
4. Blood goes back to heart through veins
2 chambered heart
Fish Classification
Kingdom: Animal
Phylum: Chordates
Subphylum: Vertebrates
Classes:
Jawless Fish (Agnatha)
Cartilaginous Fish (Chondrichthyes)
Bony Fish (Osteichthyes)
Pathway thru Heart
Deoxygenated blood returns from body to sinus venosus
To large atrium
To muscular ventricle
To conus/bulbus arteriosus
To aorta
Activities http://kr021.k12.sd.us/zoology/fish%20web.htm
http://www2.sd35.bc.ca/uconnect/salmon/DissectionGa me.html
http://quizlet.com/18408424/flashcards http://quizlet.com/53107996/test http://quizlet.com/53107996/scatter
Videos
https://www.youtube.com/watch?v=pNZQEmGp11k https://www.youtube.com/watch?v=37wCrU4psIw https://www.youtube.com/watch?v=5HMp-GXjHtg https://www.youtube.com/watch?v=zRQIXX-IF7Q https://www.youtube.com/watch?v=gz7Ku_HFNko
Works Cited
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Notes
Google images
Website Title: Quizlet
Article Title: Quizlet
Date Accessed: January 05, 2015
Website Title: YouTube
Publisher: YouTube
Date Accessed: January 07, 2015
