Question

Identify and label parts from A to L

• A. A. Tube feet, B. Cardiac stomach, C. Dermal branchiae, D. Pyloric duct, E. Pyloric caecum, F. Oesophagus, G. Gonad, H. Radial canal, I. Ampulala, J. Ring canal, K. Stone canal, L. Madreporite
  
• B. A. Tube feet, B. Dermal branchiae, C. Cardiac stomach, D. Pyloric duct, E. Pyloric caecum, F. Oesophagus, G. Ampulla, H. Gonad, I. Radial canal, J. Ring canal, K. Stone canal, L. Madreporite
  
• C. A. Tube feet, B. Dermal branchiae, C. Cardiac stomach, D. Pyloric duct, E. Pyloric caecum, F. Oesophagus, G. Gonad, H. Ampulla, I. Radial canal, J. Ring canal, K. Stone canal, L. Madreporite
• D. A. Tube feet, B. Cardiac stomach, C. Dermal branchiae, D. Pyloric duct, E. Pyloric caecum, F. Oesophagus, G. Gonad, H. Ampulla, I. Radial canal, J. Ring canal, K. Stone canal, L. Madreporite
  

Answer 1

The correct option is C A. Tube feet, B. Dermal branchiae, C. Cardiac stomach, D. Pyloric duct, E. Pyloric caecum, F. Oesophagus, G. Gonad, H. Ampulla, I. Radial canal, J. Ring canal, K. Stone canal, L. Madreporite

Tube feet are the modified tentacles or the arms in the organisms which belong to the group of echinoderms. Tube feet are used in locomotion. There are water canals in the tube feet which also helps in the transport of food.

Dermal branchiae are also known as skin gills. They are involved in respiration and removal of wastes. These can be observed as protection son the surface of the skin.

Digestion in starfish is carried out in two separate stomachs, the cardiac stomach and the pyloric stomach. The cardiac stomach is a sac like a stomach located at the center of the body may be pushed out of the organism's body and it is used to engulf and digest food.

Pyloric duct are the ducts which carry the digestive enzymes from the digestive gland are carried to the pyloric stomach.

Pyloric caecum is a projected or radiated duct of the digestive tract. This duct produces digestive enzymes and also allows digested food to be stored.

Oesophagus is the muscular structure that allows the food to reach the stomach.

Gonad includes the glands which are located in the arms. These glands are involved in producing gametes (spermatozoids or ovules) depending on the sex of the starfish.

Ampulla is the bulb-like structure that contracts to let the water enter the tube foot allowing it to extend and when it dilates, the foot retracts.

The body of this organism contains the water vascular system. The parts of this system are Radial canal, Ring canal, Stone canal and Madreporite.

Thus, the correct answer is option C.