Define features of male and female ascaris lumbricoides, Biology

Assignment Help:

Define Features of male and female ascaris lumbricoides?

i)  Ascaris  lumbricoides is  commonly called  round worm.

ii)  Body  is elongated, cylindrical,  tapering at  both ends.

iii)  Body surface  is marked with four longitudinal  lilies, one mid-dorsa!,  one midventral and two  lateral  lines.

iv)  Mouth is provided with  three  lips (i) a median dorsal  lip and  (ii) a pair of  symmetrical  sub medial ventral lips.

v)  Sexes are separate and sexual  dimorphism  is well  marked.

vi)  Male is smaller  than female and measures  15 to 31cm in  length with posterior end curved ventrally.

vii)  Female is large, measuring  a length of 20 to 35 cm with posterior end  straight arid blunt.

 viii) Male has single testis and seminal vesicle. Seminal  vesicle  leads to the exterior  via an  ejaculdtory duct located alongside the anus. It  is also provided at the  posterior end with a pair of curved  spicules  know  as penial setae which  are the  copulatory organs. Males also possess pre- and post-anal papillae, which  are  lacking  in female.

ix)  The female has 2 ovaries, 2 oviducts and 2 uteri joining at a single vagina and opening through a  gonopore also called genital aperture which  lies at a distance of about one-third of the  length  of the body from  the anterior end.

x)  Excretory pore is small and  lies on  the ventral side about 2 mm  away from  [lie anterior  end.

xi)  Life cycle is simple and monogenetic.  No secondary host is involved.


Related Discussions:- Define features of male and female ascaris lumbricoides

Explain the feeding process for preschoolers, Explain the Feeding process f...

Explain the Feeding process for Preschoolers? The word preschool children, you may be aware, is used for children less than six years of age. After the first year, there is a s

Illustrate thallium scintigraphy, Q. Illustrate Thallium Scintigraphy? ...

Q. Illustrate Thallium Scintigraphy? It is often done with SPECT (single photon emission computed tomography) which further increases the sensitivity. However, a stress test w

Explain the compartments of body water, Explain the Compartments of Body Wa...

Explain the Compartments of Body Water? Within the body, water is found in two major compartments. These are: - The intracellular compartment (inside the cell) - The extr

Define age as a determinants of nutrient requirements, Define Age as a dete...

Define Age as a determinants of nutrient requirements? Age: Requirements change with increasing age between birth and maturity. Nutrient requirements per unit body weight are h

Male gamete and the female gamete in a flowering plant, What is (a) the mal...

What is (a) the male gamete, and (b) the female gamete in a flowering plant?   (a) The male gamete in a flowering plant is the pollen grain (strictly, the gamete is the male

Explain recovery or anabolic phase of stress response, Explain Recovery or ...

Explain Recovery or Anabolic Phase of Stress Response? When wounds are closed and infection has resolved, repletion of lean tissue and fat stores along with restoration of stre

Chamaleon, how does chamaleon change its colour

how does chamaleon change its colour

What is food pyramid, Food Pyramid The diabetes food pyramid divides fo...

Food Pyramid The diabetes food pyramid divides food into six groups. These groups vary with each other on the basis of size occupied in the pyramid. The largest i.e. grains, br

Respiration, what is the meaning of direct and indirect respiration

what is the meaning of direct and indirect respiration

Treatment of infective endocarditis, Two major objectives must be achieved ...

Two major objectives must be achieved to treat IE effectively. The infecting  micro-organism in the vegetation must be eradicated. Also, invasive, destructive intracardiac and foca

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd