Digestive system of Lobeo Rohita:

Digestive system of Lobeo Rohita:

Digestive system of Lobeo rohita is consist two parts:

(1) Alimentary canal

(2) Digestive gland

1. Alimentary canal: It is long and complete. It consists of the following part:

(i) Mouth: It is a sub-terminal transverse aperture. It is bounded by a pair of fleshy and immovable lips. (ii)Buccal cavity: It is dorsoventrally compressed space bounded by jaws. Teeth and tongue areabsent in the buccal cavity of Labeo.

(iii) Pharynx: It is also dorsoventrally compressed space which is distinguishable into respiratory part with internal gill slits and posterior narrow masticatory part with homodont and acrodont teeth.

(iv) Oesophagus: It is small and tubular part.

(v) Intestinal bulb: It is long and thick walled and is divided into two parts i.e. anterior bulbous,cardiac part and posterior narrow pyloric parts.

(vi) Intestine: It is long, narrow, thin-walled and tubular structure. It is highly coiled and is present in the abdominal cavity.

(vii) Rectum : It is thin-walled wider and tubular part. It opens out by anus.

(viii) Anus: It lies on mid-ventral side just in front of anal flings.

2. Digestive glands :

(1) Liver: A large sized dark brown coloured and bi-lobed liver is present. Right liver lobe is larger in size. There lies an elongated and thin walled gall bladder present ventrally. Bile is brought to intestinal bulbs by a bile duct.

(ii) Pancreas: It is located along the intestinal coil. Fine ductules arise from it and joins to form a

pancreatic duct which opens in intestinal bulb.