Male Reproductive System Female Reproductive System Copulation Fertilization Development Male reproductive system A Testis B Vasa Efferentia C Vas deference D Copulatory organ E Hypobranchial gland ID: 804251
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REPRODUCTIVE SYSTEM ofPila
Male Reproductive System
Female Reproductive System
Copulation
Fertilization
Development
Slide2Male reproductive system:A) TestisB) Vasa EfferentiaC) Vas deferenceD) Copulatory organ
E) Hypobranchial gland
Slide3Testis:Testis are unpaired , flat, roughly triangular & whitish-cream coloured organs.Testis are attached to the upper part of the digestive gland.It extends in first two or three whorls of the shell.It is enclosed in a thin cutaneous membrane which separates testis from shell.Testis of pila produces two types of sperms.
Slide4Eupyrene sperms:These are small & thread like.They have distinct head, middle piece & tail with single cilium.They are motile & can fertilize the eggs.
2) Oligopyrene sperms:
These are large sickle-shaped or spindle shaped.
They have head, middle piece & tail with
4-5 cilia.
They are
non-motile
unable to fertilize
egg.
Slide5Vasa Efferentia:They are numerous, minute ducts.They originate from different parts of testis & unite with each other & form a common large duct called Vas deferens.Vas deference:It arises from the posterior part of testisIt runs under the skin and divided into three parts:
i
)
Proximal tubular part
Ii) Vesicula seminalis
Iii) Terminal glandular part
Slide6Proximal tubular part:It is narrow & thin walled.It runs along the inner border of the digestive gland up to the posterior renal chamber.After renal chamber it runs to the left and reaches to the pericardium.From here it runs to the right and opens into the ventral side of
vesicula
seminalis
.
Slide7ii) Vesicula seminalis:It is situated at the right side of pericardium.It is slightly curved & flask shaped swollen structure.It has a blind, rounded prolongation.It serves as a store house of sperms.
Vesicula seminalis opens on the left side into terminal glandular part of part of the vas deference.
Slide8iii) Terminal glandular part:It is thick walled glandular part.It runs along the left side of the rectum and finally opens by male genital pore.Male genital pore is situated a little behind the anus, at the tip of claw-shaped
genital papilla.
Slide9Copulatory organ:It arises from the edge of the mantle in front of anus.Its length is about 1.5 cm.It is slightly curved with wider base & pointed tip.Its surface bears a longitudinal groove.
It is enclosed in a yellow coloured sheath.
Sheath is a sac-like outgrowth of mantle situated at its base.
Slide10Hypobranchial gland:It is situated at the base of sheath.It is an oval-shaped & glandular in function.There is nom duct and secretion of the gland is discharged directly on the surface.
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