Question

In a tabular form write four differences between the alimentary canal of a bird and that of grasshopper​

Answer 1

Answer:

Alimentary canal of birds '

1 mouth is modified into beaks

2. Duodenum is present

3 the Alimentary canal is relatively longer

4 Alimentary canal ends in cloaca

Alimentary canal of grasshopper ::

1 mouth is modified into mandible and maxilla for biting and chewing

2 Duodenum is absent.

3 the Alimentary canal is relatively shorter

4 Alimentary canal ends in anus

Answer 2

Explanation

ALIMENTARY CANAL -

The difference between the alimentary canal of bird and grasshopper are -

BIRD -

• Due to behavioral and dietary adaptations, the digestive tract is complex and different from mammals.
• The tract consists of the beak, mouth, tongue, pharynx, esophagus, crop, proventriculus, gizzard, small intestine, caeca, rectum, cloaca.
• Teeth are absent in the mouth, jaws are covered by beaks.
• The esophagus is long and narrow and shows peristalsis movement to swallow large food particles.
• The crop is not present in all birds and is for food storage.
• The stomach or gizzard or proventriculus is muscular and glandular consisting of small stones for grinding food.
• The small intestine receives bile and digestive enzymes from the associated glands.
• The large intestine is small with a pair of caeca.
• Cloaca is a common opening for digestive, urinary, and reproductive secretions.

GRASSHOPPER -

• A long tubular track consisting of foregut, midgut, and hindgut.
• Foregut starts from the mouth that has three appendages for food intake.
• The mouth is followed by the pharynx and oesophagus.
• They possess and swelled esophageal part called crop to store food.
• Gizzard filters and grinds food by the presence of sclerotized teeth.
• The stomach or midgut has gastric caeca for digestion and absorption of food.
• Hindgut has a small and large intestine consisting of rectal papillae for absorption of water and essential ions.
• The anus is the excretory organ for waste removal.