The hepatic caeca is present at the junction of the foregut and the midgut of the cockroach. Their function is to secrete the digestive juices to facilitate digestion.
What is the function of hepatic cecum in amphioxus?
It is apparent that the hepatic cecum performs important roles in the immunity of amphioxus including immune surveillance, clearance of pathogens and acute phase response. Therefore, the hepatic cecum, like the vertebrate liver, is an organ functioning as a key integrator of immunity in amphioxus.
Where is hepatic Caecum located in cockroach Why is it useful?
The hepatic caeca is present at the junction of the foregut and the midgut of the cockroach. Their function is to secrete the digestive juices to facilitate digestion.
How many hepatic caeca are present in grasshopper?
Six pairs of elongated, cone shaped hepatic caeca are present in a grasshopper.
What is the role of the gastric caeca in a grasshopper?
Grasshopper Digestive System:
The gastric caeca serve to increase the surface area of the midgut, thus increasing both its ability to secrete digestive enzymes and its ability to extract useful products from the partially digested food.
What is the function of midgut in cockroach?
The insect midgut plays critical roles in digestion and nutrient uptake as well as detoxification and oxidative stress responses.
What is the function of Endostyle in amphioxus?
The endostyle is a longitudinal, ciliated, grooved organ on the ventral wall of the pharynx that secretes mucoproteins into the alimentary canal for filter feeding (Fig.
Which sternum is boat shaped in female cockroach?
The 7th sternum is boat-shaped and an 8th and 9th sternum together forms a genital pouch.
Which is absent in blood of cockroach?
The blood of the cockroach is colorless due to the absence of haemoglobin which is the respiratory pigment in blood. Therefore, its blood lacks respiratory pigment or haemoglobin.
What is the function of the Proventriculus in birds?
Stomach (Proventriculus/Gizzard): Principally the organ where food is broken into smaller units. It has two parts: the proventriculus for storage and the gizzard. The gizzard is a muscular part of the stomach that uses grit to grind grains and fiber into smaller particles.
How many hepatic Caecae do cockroaches have?
At the junction of foregut and midgut, there are 4-6 fingerlike structures called hepatic caeca. They are thin, transparent blind tubules arranged in rosette fashion in the anterior part of the stomach. Their function is to secrete digestive juices.
What is hepatic caeca in cockroach?
In cockroach, the hepatic caeca is present at the junction of the foregut and midgut. It is a ring of 6-8 blind tubules. Their function is to secrete digestive juices to facilitate digestion.
Which is the part of digestive system of cockroach?
The three divisions of the cockroach digestive tract are: the foregut, which includes the crop and proventriculus, midgut, which includes the section below the proventriculus up to the caeca, and the hindgut, which includes the Malpighian tubules and the rectum.
Do humans have a gastric caeca?
In herbivores, the cecum stores food material where bacteria are able to break down the cellulose. In humans, the cecum is involved in absorption of salts and electrolytes and lubricates the solid waste that passes into the large intestine.
How gastric caeca helps in the process of digestion?
Near its anterior end, finger-like projections (usually from 2 to 10) diverge from the walls of the midgut. These structures, the gastric caecae, provide extra surface area for secretion of enzymes or absorption of water (and other substances) from the alimentary canal.
How many gastric caeca Does a grasshopper have?
The epithelial cells of the mid-gut and its six bi-lobed gastric caeca, and of the six rectal glands have a striated border of separate 5laments which are cilia-like in a pearance but devoid of motion.
What is the function of the midgut?
The midgut has diverse functions for all insects. It is the primary tissue that deals with an incoming meal. It is thought to produce and secrete most of the digestive enzymes and components of the peritrophic matrix and is thus the first site of digestion.
What is the function of esophagus in cockroach?
Alimentary system of cockroach
Mouth leads into pharynx which leads immediately into a narrow tube called oesophagus. The distal end of the oesophagus enlarges into a large sac like structure called crop which is useful to store the food prior to digestion.
What is foregut midgut hindgut?
The foregut (or anterior gut) is from the oral cavity to the initial part of the duodenum. The midgut is from the mid-duodenum to the initial two-thirds of the transverse colon. The hindgut is from the later one-third transverse colon to the upper portion of the anus.
What is absent in Branchiostoma?
So, the correct answer is ‘Head‘.
What is the important of endostyle in Lancelets and Ascidians?
Endostyle is useful for accumulating and moving food particles to the oesophagus in lancelets and ascidians.
What is the importance of endostyle in Lancelets and Ascidians?
The endostyle of Lanceletes (Amphioxus) and Ascidians secretes mucus which helps to gather the food particles scattered in water. It is a ciliated glandular groove present on the floor of the pharynx.
Where are sperms stored in cockroaches?
In cockroaches, the sperm are stored in the seminal vesicles which is a part of the reproductive system of the cockroach. In seminal vesicles, the sperms are glued together in the form of bundles which are known as spermatophores, and discharged during copulation.
In which segment of cockroach appendages are absent?
In cockroaches, prothorax is the anterior segment of the thorax of an insect and this segment does not bear any wings.
Are cockroaches male or female?
Male cockroaches | Female cockroaches |
---|---|
Slender abdomen with a pointed final segment. | Boat-shaped abdomen with a blunt last segment. |
Males have a longer wingspan than females. | Females have shorter wingspan than males, and brown-banded females can’t fly. |
Which is absent in blood of earthworm?
Complete answer:
The colour of the earthworm’s blood is red in colour and haemoglobin is found to be dissolved in the plasma of blood. RBCs (red blood cells) are absent in them.
What is the lower lip of cockroach called?
Labrum – Labium is the lower lip of the mouth of the insect.
What is Ecdysis in cockroach?
Ecdysis is a phase in molting, the time when cockroaches shed their exosekeleton in order to molt. It is regulated by the juvenile hormone secreted by corpora allata. Cockroaches has compound eyes made up of repeating units ommatidia, each of which functions as a separate visual receptor.
What is the difference between proventriculus and gizzard?
is that proventriculus is the part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes while gizzard is a portion of the esophagus of either a bird or an annelid that contains ingested grit and is used to grind up ingested food before it is transferred to the stomach.
What type of digestion is a proventriculus?
The proventriculus (also known as the true stomach) is the glandular stomach where digestion primarily begins. Hydrochloric acid and digestive enzymes, such as pepsin, are added to the feed here and begin to break it down more significantly than the enzymes secreted by the salivary glands.
What is the digestive system of birds?
The digestive order is as follows: bill, mouth, tongue, pharynx, esophagus, crop, proventriculus, gizzard, small intestine, caeca, rectum, cloaca. shapes and are used for scooping, pecking, tearing and generally picking up the bird’s food.
Can roaches pee?
Just like with their droppings, cockroaches will urinate anywhere, and their urine also contains harmful diseases. If you have a large infestation on your hands then there might be a chance that a lot of items might be contaminated with cockroach urine in your property.
Which enzyme is present in saliva of cockroach?
Cockroaches have a pair of labial glands which acts as salivary glands where the ducts of the gland open into salivarium, their saliva contains amylase for the digestion of starch. Amylase is an enzyme which catalyses the hydrolysis of starch forming sugars.
What is the main excretory product of cockroach?
Hint: Uricotelic species include reptiles, birds, ground snails, and insects such as cockroaches, which excrete nitrogenous wastes as uric acid in the form of pellets or paste with minimal water loss. The key components of cockroach and other insect excreta are urea and uric acid.
What are Alary muscles in cockroach?
Alary muscles in cockroach are associated or connected with Heart. These muscles are attached to both dorsal and tergum diaphragm. They are triangular in shape where in the pointed end is attached to the tergum and other end is attached to dorsal diaphragm.
How many Oothecae are produced by female cockroach?
On an average, 9 to 10 oothecae are produced by a female cockroach.
What is digestive system of frog?
The digestive tract includes the oral cavity, pharynx, esophagus, stomach, and small and large intestine, ending in the cloaca. Morphological characteristics of the digestive tract are distinct between anuran species.
What is the digestive system of a grasshopper?
The foregut of grasshopper (or cockroach) consists of following organs: mouth, oesophagus or food pipe, crop and gizzard. The midgut of grasshopper (or cockroach) consists of stomach and ileum. Colon and rectum constitute the hindgut of a grasshopper (or cockroach).
Is also called as brain of cockroach?
Supra-oesophageal ganglion is also called as brain of cockroach.