Advertisements
Advertisements
प्रश्न
Explain the digestive system of Cockroach with the help of a labelled sketch.
उत्तर
The digestive system consists of an alimentary canal and digestive glands. The alimentary canal of cockroaches is divided into the foregut, midgut and hindgut. The mouth opens into a short tubular pharynx, leading to a narrow tubular passage, the oesophagus, which opens into a sac-like crop used for storing food. The crop is followed by a gizzard or proventriculus. Gizzard consists of six chitinous plates called teeth which help in grinding food. The entire foregut is lined by cuticles. A ring of six to eight blind tubular structures called hepatic or gastric cancer is present at the junction of the foregut and midgut which secrete digestive juice. At the junction of midgut and hindgut is present another ring of yellow-coloured thin filamentous malpighian tubules which help in the removal of excretory products from the haemolymph. The hindgut is broader than the midgut and is differentiated into the ileum, colon and rectum. The rectum opens out through the anus.
Alimentary canal of cockroach
APPEARS IN
संबंधित प्रश्न
Answer in one word or one line
What is the position of ovaries in cockroach?
Draw a labelled diagram of alimentary canal of a cockroach
Mention the function of the following - Malpighian tubules
The male reproductive organs of cockroach include
Dorsally placed sclerites in cockroach are termed as :
Match the following with reference to cockroach and choose the correct option
| Column I | Column II |
| A. Phallomere | i. Chain of developing ova |
| B. Gonopore | ii. Bundles of sperm |
| C. Spermatophore | iii. Opening of the ejaculatory duct |
| D. Ovarioles | iv. The external genitalia |
Give the location of hepatic caeca in a cockroach. What is their function?
Complete the following statement:
In cockroach grinding of food particle is performed by ______.
Complete the following statement:
Malpighian tubules help in removal of ______.
Complete the following statement:
In cockroach blood vessels open into spaces called ______.
