In multicellular organisms, when specific cells, organs or organs perform specific tasks, it is called division of labor. In the animal kingdom, division of labor is first seen in the Nidarians or Hydra. Physiological and cellular division of labor can be seen in Hydra.
Physical division of labor
1. Mouth: Controls intake of food, excretion of waste and flow of water.
2. Traction: Used for locomotion, catching prey, climbing and self-defense.
3. Body: Aids in locomotion and contains buds and genitals.
4. Epidermis: Structures and protects the body.
5. Mesoglia: Forms the base and structure and helps in contraction and expansion of the body.
6. Cilantron: Works on digestion and circulation.
7. Padachakti: Helps to move and keep the body bound.
Cellular division of labor
1. Musculoskeletal Cells: Helps build body armor, locomotion and capture prey.
2. Interstitial cells: Any cell or organ that forms the body.
3. Sensory and nerve cells: Receive and report stimuli.
4. Nutrient cells: carry out extracellular and intracellular digestion.
5. Gland cells: secrete enzymes and sticky substances.