Page 191 - Biology_F5

Biology for Advanced Level Secondary Schools

glandular hepatic caeca (digestive/ Eye
mesenteric caeca) which increase the Salivary duct
Salivary
surface area for absorption. The cells Oesophagus gland
lining the mesenteron secrete enzymes. Salivary
Most of the food nutrients are digested Crop receptacle
in the mesenteron and the end products Gizzard
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of the digestion are absorbed by the cells Hepatic caeca
of mesenteron and digestive caeca. The Mesenteron
distal end of the midgut is indicated by the Malphighian Rectum
tubules
Anal cercus
presence of malpighian tubules, which are Ileum Colon Tenth abdominal tergum
excretory in function (Figure 3.54).
Figure 3.54: The digestive system of a female

The hindgut comprises the ileum, colon, cockroach
and rectum. On one hand, the ileum Reproductive system of a male
is short and narrow and receives the cockroach
openings of the malpighian tubules. On The male cockroach has a pair of anal styles;
the other hand, colon is wider and longer the external structure that differentiates
than the rectum. The wall of the rectum the male cockroach from female. Testes
is provided with six rectal papillae, which are small lobed masses (lobules) lying
help in the absorption of water and salts. laterodorsally in the fourth and fifth
The digestive system terminates with abdominal segments. There are two testes
the anal opening (anus) through which (one on the right and the other on the left),
undigested material is removed in the each joined to a slender vas diferens (plural
process known as egestion. vasa diferentia), which connect to the wider
ejaculatory duct.

Lobules of testes

Vas deferens
Mushroom gland

Ejaculatory duct
Ventral phallomere Right phallomere
Cercus Pseudo-penis
Anal style

Figure 3.55: The reproductive system of a male cockroach
The testes produce sperms, which are bundle called spermatophore (sperm pouch).
transfered through the vasa differentia to the There are three asymmetrical chitinous
seminal vesicle. All sperms from a seminal structures, called male gonapophyses or
vesicle are collected together into a large phallomeres: the right phallomere the

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