Cockroach digestive system and reproductive system

Digestive system

             The digestive system of cockroach includes the mouth parts, the alimentary canal and the salivary glands.

           The alimentary canal of cockroach consists of the mouth which leads into buccal cavity. The buccal cavity leads into narrow oesophagus is a thin walled crop. Next to crop is a thick walled gizzard which is followed by midgut. 

            From the midgut arises eight finger shaped hepatic caeca. Midgut is followed by a short ileum which in turn is followed by a long coiled colon. Colon ends in a board rectum. Fine yellow coloured thread like malpighian tubules are attached at the junction of midgut and hingut. 

       The digestive glands include salivary glands and hepatic caeca. Cockroach is omnivorous. It feeds on both plant and animal materials 

Cockroach- Reproductive system

             Sexes are separate. Male can easily be distinguished from the female. Testes are the male reproductive organs and ovaries are female reproductive organs.

Cockroach- Male reproductive system

              The male reproductive system of cockroach consists of a pair of testes which produce spermatozoa, a pair of vasa deferentia mushroom shaped gland and conglobate gland. 

Cockroach- Female reproductive system

                 The female reproductive system of cockroach consists of a pair of ovaries which produce eggs, a pair of oviducts, colleterial gland and a pair of spermathecae. 

                 Fertilization takes place and eggs are formed. Female cockroach lays the fertilized eggs. Eggs are surrounded by egg case. When fully developed, The young one of the cockroach comes out. It is called nymph. Nymph moults seven times to become an adult.