Gonopore is the genital pore in some invertebrates and especially some insects. … In cockroach , in males the ejaculatory duct is an elongated wide median duct which run backwards in the abdomen and opens out by MALE GONOPORE situated ventral to anus.
What is female gonopore in cockroach?
The female gonopore is an aperture in the 8th sternum, which lies inside the genital chamber inflected above the 7th sternite. The 7th sternite is also produced backwards into two large oval gynovalvular plates or apical lobes. The genital pouch is also referred to as gynatrium.
What is a gonopore in biology?
Definition of gonopore
: a genital pore in some invertebrates and especially some insects.
What is the meaning of Gonophore?
A gonophore is a reproductive organ in Hydrozoa that produces gametes. It is a sporosac, a medusa or any intermediate stage. The name is derived from the Greek words γόνος (gónos, that which produces seed) and -φόρος (-fóros, -bearing).
What are Penial spicules?
Penial spicules: Penial spicules are located in the spicular pouch. Two spicular pouches are situated on the dorsal side of the cloaca. These are basically evaginations of the cloaca. The penial spicules are enclosed in a spicular sheath and it consists of a cytoplasmic core surrounded by thick cuticle.
Is ejaculatory duct in cockroach paired?
The cockroach has a segmented body that is divided into three different parts- head, thorax, and abdomen. The male reproductive system of Periplaneta consists of a pair of testes, a pair of vasa deferentia, and ejaculatory duct, a pair of seminal vesicles, a mushroom-shaped gland, and a phallic gland.
What is gonopore in liver fluke?
The gonads in these liver flukes are well developed. The genital atrium is situated in the anterior part of the body and it open out through common genital aperture or gonopore. The gonopore is located just in front of the acetabulum.
What is gonopore in Ascaris?
Each spicular pouch secretes and houses a club-shaped spicule or penial seta enclosed in a spicular sheath and it consists of a cytoplasmic core surrounded by the thick cuticle. … The spicules help in opening female gonopore during copulation. Sperms of Ascaris are the tail, asymmetrical and amoeboid.
Where are sperm 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.
What is the position of testes in cockroach?
Hint: The male reproductive system of a cockroach consists of two testes. These testes lie on both the lateral sides of the abdomen.
What is the use of Penial setae?
Dorsal to the cloaca is a pair of penial sacs that contain a pair of spicules or penial setae, which serve in copulation.
How big is an infertile Ascaris egg?
Ascaris lumbricoides unfertilized eggs.
In some cases, the outer layer is absent (known as decorticated eggs). Fertile eggs range from 45 to 75 µm in length. Unfertilized eggs are elongated and larger than fertile eggs (up to 90 µm in length).
What is the function of Penial setae?
Penial setae:
Protractor and retractor muscles, associated with the wall of each penial sac respectively serve to protrude and retract the contained spicule through the cloacal aperture. During copulation, the spicules protrude out to keep the female’s vulva open.
How many Ovarioles do female cockroaches have?
The female reproductive system consists of two large ovaries, lying laterally in the 2nd – 6th abdominal segments. Each ovary is formed of a group of eight ovarian tubules or ovarioles, containing a chain of developing ova, so in total 16 ovarioles.
How can you tell a male cockroach?
The wings of the male cockroach are larger. The wings of the female cockroach are smaller. The antennae of male cockroaches are smaller than that of the females. The antennae are relatively larger than that of the males.
How many ejaculatory ducts are in the male reproductive system?
There are two ejaculatory ducts, left and right side, that are formed by the union of the duct from the seminal vesicle and the ductus (vas) deferens.
Which is the excretory organ of liver fluke?
Animal | Excretory Organs |
---|---|
Earthworm | Nephridia |
Liver fluke | Flame cells |
Prawns | Green/antennal glands |
Cockroach | Malpighian tubules |
What is acetabulum in liver fluke?
The acetabulum is an adaptive parasitic morphologic feature in the liver flukes and other worms such as the annelids, which is basically used for attachment. … The acetabulum can be described as a large sucking organ in these worms, with which the worms have the ability to attach to the host and move.
What is the liver fluke habitat?
Liver fluke occurs in regions and areas on individual farms where watery environments, such as springs, slow-moving streams with marshy banks, irrigation channels and seepages, suit hatching of fluke eggs into swimming larvae and provide a habitat for aquatic snails.
What is pineal setae in Ascaris?
In the male Ascaris, the tail is curved and the anus is replaced by cloaca. From the cloaca, two equal chitinous spicules rise or penial setae projects out. These are helpful in the process of copulation.
How many ovaries does the female Ascaris have?
Complete answer: Male Ascaris is monarchic, which means it possesses a single testis, while female Ascaris is didelphic which means, it has two ovaries, two oviducts, and two uteri.
Is Spermatheca present in male cockroach?
A) 6th abdominal segment of male. B) Hint: The spermatheca is an ectodermal organ responsible for receiving, maintaining, and releasing sperm to fertilize eggs. …
How many ganglia are in cockroach?
Three ganglia are present on the thorax, and six in the abdomen. The nervous system of the cockroach is distributed all over the body.
Where are sperm stored in the male?
Along the top of each testicle is the epididymis. This is a cordlike structure where the sperm mature and are stored.
What is hemolymph in cockroach?
Cockroaches, like other insects have an open circulatory system and their blood is also known as haemolymph. It flows freely inside the body, touching all the internal organs and tissues. About 90% of this blood is watery fluid and the remaining 10% is made up of hemocytes.
What’s the difference between a male and female cockroach?
The body of female cockroach is relatively larger than the male body. The abdomen of male cockroach is slender as well as the last segment of the abdomen is pointed. … The wings of female cockroaches are smaller. The antennae of male cockroach are smaller than that of the female’s cockroach antennae.
What is the function of mushroom gland in cockroach?
– Mushroom gland- It is also known as utricular gland. They have a large number of white tubules present above the ejaculatory duct. It forms the innermost layer. It acts as an accessory reproductive gland which nourishes the sperm.
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.
Is Pseudocoelom present in Ascaris?
Explanation: Pseudocoelom (false body cavity) is found in Ascaris (phylum Nematohelminthes or Aschelminthes). … Pseudocoelom is not completely lined with the mesodermal tissue. It washes the internal organs like the digestive system and the procreative system.
Where are eggs fertilized in Ascaris?
– The larva matures in alveoli and again migrates to the intestine where it develops into the adult and releases fertilized egg in the lower part of the intestine which passes through faeces.
What is setae annelids?
Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of chitin.
What kills Ascaris eggs?
Since Ascaris eggs have 3 layers and are very resistant, the acetic acid concentration, which can be effective on these eggs are thought to be effective also on many other parasitic agents.
What kills Ascaris?
The treatment for ascariasis is anti-helminthic (roundworm-killing) drugs, taken by mouth. These include albendazole, ivermectin, and mebendazole. Albendazole and ivermectin are available in the U.S. for human treatment as ready-to-prescribe pills, but a compounding pharmacy must specially prepare mebendazole.
Which in life history of Ascaris takes place in?
Third moulting in the life cycle of Ascaris takes place in lungs (alveoli). … After about 6 day’s stay in alveoli, the second stage larva moults to become the third stage larva. Another moult after 4 days results in the fourth stage larva.
What is cloacal aperture?
Cloacal aperture is the posterior most opening on the surface of cloaca . It is found mainly as vertebrates like fishes , reptiles ,amphibians. … Cloaca is a chamber in which digestive tract and urogenital passages.
How many eggs can a female Ascaris produce in a day?
Adult worms live in the small intestine for 1 to 2 years. They can be as thick as a pencil and can measure from 5 to 14 inches long. A person can have many worms at the same time if many eggs hatch. And each female worm can produce over 200,000 eggs per day.