Skeletal System of Fish: Fish Anatomy, Introduction to Skeletal System

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Fish Anatomy

  • The study of the form or morphology of fishes is called fish anatomy.

  • The physical characteristics are water, the medium in which fish live.

  • They have a variety of different body plans.

  • The body is divided into head, trunk, and tail.

  • The body is fusiform (a streamlined body plan often found in fast-moving fish), filiform (eel shaped) or vermiform (worm-shaped).

  • They are often either compressed (laterally thin) or depressed (dorso-ventrally flat).

Anatomical Directions and Axes

Anatomical Directions and Axes

Anatomical Directions and Axes

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Skeletal System and Composition

  • The general features include fins, streamlines, scales, and tails.

  • They are good swimmers.

  • Fishes found in aquatic habitat:

    • Cartilaginous (Chondrichthyes)

    • Bony fishes (Osteichthyes)

  • Composition:

    • Thin and flexible cartilage.

    • Hard-calcified bones or both.

  • Two different skeletal types:

    • Exoskeleton, which is an outer shell of an organism.

    • Endoskeleton, which is an inner shell of an organism.

  • Other main features of the fish skeletal system:

    • Vertebral column

    • Jaw

    • Ribs

    • Cranium and intramuscular bones

Vertebral column running from the head to the tail.

Skeletal Structure of a Bass

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Functions of the Skeletal System

Functions of the Skeletal System

Functions of the Skeletal System

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FAQs

Q 1. What are the two different skeletal types?

Answer:

The two different skeletal types arei) Exoskeleton, which is an outer shell of an organism.

ii) Endoskeleton, which is an inner shell of an organism.

Q 2. List out some of the features of fish skeletal system?

Answer:

Some of the features of fish skeletal system are:

i) Vertebral column

ii) Jaw

iii) Ribs

iv) Cranium and intramuscular bones

Q 3. What are the important functions of the fish skeletal system?

Answer:

i) Protection.

ii) Helps in movement.

iii) Provides shape and support.

iv) They are the site for the storage of minerals like calcium.

Q 4. What are the various body shapes in Fish?

Answer: The body is fusiform (a streamlined body plan often found in fast-moving fish), filiform (eel shaped) or vermiform (worm-shaped).