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Questions and Answers
What is located at the hind end of the abdomen?
What is located at the hind end of the abdomen?
- The dorsal anus
- The ventral male genital pore
- The gonapophysis (correct)
- The anal cerci
What is the outer layer of the gizzard made of?
What is the outer layer of the gizzard made of?
- Chitinous plate
- Thick circular muscles (correct)
- A thick inner cuticle
- Jointed filamentous structures
What is the last region of the alimentary canal?
What is the last region of the alimentary canal?
- Foregut
- Midgut
- Hindgut
- Rectum (correct)
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Study Notes
- The male genital pouch or chamber lies at the hind end of the abdomen, bounded dorsally by the 9th and 10th terga and ventrally by the 9th sternum.
- It contains the dorsal anus, ventral male genital pore, and gonapophysis.
- The 10th segment bears a pair of jointed filamentous structures called anal cerci.
- The alimentary canal present in the body cavity is divided into three regions: foregut, midgut, and hindgut.
- The mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus.
- The oesophagus opens into a sac like structure called the crop, which is followed by the gizzard or proventriculus.
- The gizzard has an outer layer of thick circular muscles and a thick inner cuticle forming six highly chitinous plate called teeth.
- The hindgut is broader than the midgut and is differentiated into the ileum, colon, and rectum.
- The rectum opens out through the anus.
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