← Marine and Fisheries Technology / 1 Fish Biology and Ecology
1.2 Fish Physiology
Marine and Fisheries Technology · Grade 11 · 30 lessons in the design
What you will be able to do
- illustrate the digestive system in fish
- model the circulatory system of fish
- describe the respiratory system of fish
- recognise the importance of fish physiology
- relate the diet of a fish to the structure of its digestive system
- explain gaseous exchange in the gills of a bony fish
- appreciate how fish physiological structures are adapted to their functions
Key questions
“How are fish physiological structures adapted to their functions?”
Lessons
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Introduction to fish physiology
40 min · 1 practice tasks · quizIntroduce fish physiology and the three body systems of a bony fish.
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The digestive system of a bony fish
40 min · 1 practice tasks · quizDescribe the parts and the path of food through the digestive system of a bony fish.
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The mouth and buccal cavity
40 min · 1 practice tasks · quizRelate the position of the mouth and the parts of the buccal cavity to feeding.
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The pharynx and oesophagus
40 min · 1 practice tasks · quizDescribe how food passes through the pharynx and oesophagus.
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The stomach
40 min · 1 practice tasks · quizDescribe the structure and function of the fish stomach.
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The intestine and absorption
40 min · 1 practice tasks · quizDescribe digestion and absorption in the fish intestine.
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The liver, gall bladder and pancreas
40 min · 1 practice tasks · quizDescribe the liver, gall bladder and pancreas and their roles in digestion.
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Digestion in a carnivorous fish
40 min · 1 practice tasks · quizDescribe how the digestive system of a carnivore is adapted to a flesh diet.
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Digestion in a herbivorous fish
40 min · 1 practice tasks · quizDescribe how the digestive system of a herbivore is adapted to a plant diet.
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Digestion in an omnivorous fish
40 min · 1 practice tasks · quizDescribe how the digestive system of an omnivore is adapted to a mixed diet.
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Comparing digestive systems and diets
40 min · 1 practice tasks · quizCompare the digestive systems of carnivores, omnivores and herbivores.
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The circulatory system of a fish
40 min · 1 practice tasks · quizDescribe the parts and the single loop of the fish circulatory system.
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The fish heart
40 min · 1 practice tasks · quizDescribe the structure and pumping action of the fish heart.
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Blood vessels of a fish
40 min · 1 practice tasks · quizRelate the structure of arteries, veins and capillaries to their functions.
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Blood of a fish
40 min · 1 practice tasks · quizDescribe the composition and functions of fish blood.
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Single and double circulation
40 min · 1 practice tasks · quizCompare the single circulation of a fish with the double circulation of a mammal.
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Modelling the circulatory system
40 min · 1 practice tasks · quizModel and label the circulatory system of a bony fish.
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The respiratory system of fish
40 min · 1 practice tasks · quizDescribe how a fish obtains oxygen from water.
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Structure of the gills
40 min · 1 practice tasks · quizDescribe the gill arches, filaments, lamellae and operculum.
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Gill arches and gill rakers
40 min · 1 practice tasks · quizDescribe the gill arch and the function of the gill rakers.
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Gill filaments and lamellae
40 min · 1 practice tasks · quizDescribe how filaments and lamellae are adapted for gaseous exchange.
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Gaseous exchange in the gills
40 min · 1 practice tasks · quizExplain how oxygen and carbon dioxide are exchanged at the gills.
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Countercurrent exchange
40 min · 1 practice tasks · quizExplain how opposite flows of water and blood improve oxygen uptake.
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The breathing mechanism
40 min · 1 practice tasks · quizDescribe the buccal-opercular pump that moves water over the gills.
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Adaptations of gills to gaseous exchange
40 min · 1 practice tasks · quizSummarise how the gills are adapted for efficient gaseous exchange.
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Gills compared with lungs
40 min · 1 practice tasks · quizCompare gaseous exchange in gills and in lungs.
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Importance of fish physiology
40 min · 1 practice tasks · quizExplain why a knowledge of fish physiology is important.
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Fish physiology in aquaculture
40 min · 1 practice tasks · quizApply knowledge of fish physiology to fish farming.
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Investigating fish physiology
40 min · 1 practice tasks · quizCarry out a simple, humane investigation of the gills and gut of a bony fish.
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Review of fish physiology
40 min · 1 practice tasks · quizReview the digestive, circulatory and respiratory systems and answer the key question.