Explain the digestive system of cockroach with the help of a labelled sketch.
(N/A) The digestive system of a cockroach consists of an alimentary canal divided into three regions: $Foregut$,$Midgut$,and $Hindgut$.
$1$. $Foregut$: It includes the mouth,pharynx,esophagus,crop (for food storage),and gizzard (for grinding food).
$2$. $Midgut$: It is a narrow,tubular structure lined with glandular epithelium. At the junction of the foregut and midgut,there are $6-8$ blind tubules called hepatic caeca that secrete digestive juices.
$3$. $Hindgut$: It is broader than the midgut and consists of the ileum,colon,and rectum. At the junction of the midgut and hindgut,there are $100-150$ yellow-colored,thin,filamentous Malpighian tubules which help in the excretion of excretory products from the hemolymph.
$1$. $Foregut$: It includes the mouth,pharynx,esophagus,crop (for food storage),and gizzard (for grinding food).
$2$. $Midgut$: It is a narrow,tubular structure lined with glandular epithelium. At the junction of the foregut and midgut,there are $6-8$ blind tubules called hepatic caeca that secrete digestive juices.
$3$. $Hindgut$: It is broader than the midgut and consists of the ileum,colon,and rectum. At the junction of the midgut and hindgut,there are $100-150$ yellow-colored,thin,filamentous Malpighian tubules which help in the excretion of excretory products from the hemolymph.
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$(i)$ Mouth opens into a short tubular pharynx,leading to a narrow tubular passage called oesophagus.
$(ii)$ Gizzard helps in grinding the food particles.
$(iii)$ $A$ ring of $6-8$ blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut,which secrete digestive juice.
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$(i)$ Mouth opens into a short tubular pharynx,leading to a narrow tubular passage called oesophagus.
$(ii)$ Gizzard helps in grinding the food particles.
$(iii)$ $A$ ring of $6-8$ blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut,which secrete digestive juice.
$(iv)$ At the junction of midgut and hindgut is present another ring of $100-150$ yellow coloured thin filamentous Malpighian tubules which help in removal of excretory products from haemolymph.
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$(i)$ It consists of a network of trachea that open through $12$ pairs of small holes called spiracles present on the lateral side of the body.
$(ii)$ Thin branching tubes carry oxygen from the air to all the parts.
$(iii)$ The opening of the spiracles is regulated by sphincters.
$(iv)$ Exchange of gases takes place at the tracheoles by diffusion.
$(i)$ It consists of a network of trachea that open through $12$ pairs of small holes called spiracles present on the lateral side of the body.
$(ii)$ Thin branching tubes carry oxygen from the air to all the parts.
$(iii)$ The opening of the spiracles is regulated by sphincters.
$(iv)$ Exchange of gases takes place at the tracheoles by diffusion.
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