Course Content
Introduction
Definition of fish, fishes, Fisheries and Aquatic habitats, Economic importance of fish
0/3
Taxonomy
Classification of Super class Pisces up to family, general characters of classes, Nomenclature of classes, family, genera and species of fishes, Identification of fishes of Nepal: Zoological key, illustration, specimens, experts, economically important food fishes of Nepal and their classification with characters
0/7
Digestive system
Structures of alimentary canal in different fishes, Mechanism of digestion (digestive glands, enzymes)
0/5
Nervous system
Structure of brain, Peripheral nervous system
0/3
Learn Introductory Icthyology with Rahul
About Lesson

Adrenal gland:

  • The adrenal gland in fishes is quite different from that of mammals. The two components of the adrenal gland i.e. cortex and medulla are separately found.
  • Location: One of three layers of cells lying along cardinal veins in the region of the hematopoietic head kidney.
  • Origin: Mesodermal layer of the embryo
  • Secretion: Adrenaline, Cortisol

 

Function:

  • Promote utilization of steroid fat
  • Carbohydrate metabolism
  • Water metabolism
  • Protein catabolism
  • Sodium retention
  • Electrolyte metabolism
Verified by MonsterInsights