Transcript Internal Anatomy of Fish

Internal Anatomy of Fish
Smooth
Muscle
Cell
Tissue
Cell
Tissue
Organ
Stomach
Smooth
Muscle Cell
Organization
of Life
Organ System
Organism
Fish
Fish Digestive System
Integumentary System
• Skin
• Most general function is protection and
coloration
Parts of the Integumentary
System
• Epidermis
– Constantly regenerating
• Mucus Layer
– Helps slide through water
– Rids fish of parasites
• Scales
– Give fish their color
– Can help you determine age
Skeletal System
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Class Osteichthyes: Bones & Cartilage
Class Chondricthyes: Cartilage
General function is support and movement
Also protects inner organs
Muscular System
• General function is movement
• 3 types of muscles
– Skeletal
• Moving on purpose
• Voluntary
– Smooth
• Controls inner organs
• Involuntary
– Cardiac
• Move blood
• Involuntary
Digestive System
• General function is to process food and
use for nutrients/energy.
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Mouth
Esophagus
Digestive Tube
Digestive Glands (make enzymes or store
them)
– Liver, pancreas, gall bladder
• Anus
Respiratory System
• General Function is oxygen and carbon
dioxide exchange
Gills
– Gill raker keeps food from leaving mouth
through gills
– Gill filaments is where gas exchange occurs
Gas bladder
– Fills with air to keep fish buoyant
Circulatory System
• General function is to transport body fluids
• Heart
– 1st place blood is pumped is to the gills
• Arteries (Away from heart)
• Capillaries (Gas and nutrient exchange)
• Veins (Toward heart)
Excretory System
• General function is to remove waste from
blood
• Uses kidneys
Reproductive System
• General function is to perpetuate the
species
Nervous System
• General function is sensing, coordination
of movements, and response to stimuli.
– Composed of brain, nerves, lateral line, eyes,
ears, and nose
Fish Brain!
1. Olfactory Lobes (smelling)
2. Cerebrum (smelling and
other senses)
3. Optic Lobes (sight, sound,
and lateral line senses)
4. Cerebellum (muscle
coordination)
5. Spinal Cord (connects all
muscles and nerves to the
brain)
Endocrine System
• General function is chemical regulation of
hormones.
• Hormones can:
– Control rate of growth
– Control development of sex
characteristics
– Control capacity to respond
to light and stress