Skeletal System of Fish: Fish Anatomy, Introduction to Skeletal System (For CBSE, ICSE, IAS, NET, NRA 2022)

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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

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

Functions of the Skeletal System

Functions of the Skeletal System

FAQs

Q 1. What are the two different skeletal types?

Answer:

The two different skeletal types are i) 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) .