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how often do cuttlefish reproduce ?....( cuttlefish reproductive system)


Male Cuttlefish's Reproductive System:

Female cuttlefish reproductive system:

prrimary Reproductive Organs:

        Single testis (posterior mantle cavity)

       Vas deferens (ciliated funnel)

        Spermatophoric organ

        Vas efferens (ciliated tube)

       Spermatophoric sac (Needham's sac)

    primary Reproductive Organs:

      Single large ovary (posterior mantle cavity)

        Oviduct

.      Oviducal gland (distal end of oviduct)

.       Paired nidamental glands (mantle cavity)

       Accessory nidamental glands

Sperm Development Process:

1.      Sperm produced in testis

2.      Travel through vas deferens

3.      Formed into spiral mass in spermatophoric organ

4.      Coated with membranes to become spermatophores (sperm packets)

5.      Stored in spermatophoric sac (Needham's sac) until copulation

Egg Development Process:

1.      Eggs released from ovary

2.      Travel through oviduct

3.      Equipped with:

Yolk

Egg case (2 layers):

4.      Inner layer: secretions from oviducal gland (proteins, polypeptides)

5.      Outer layer: secretions from nidamental glands

a.      Egg stained with ink

6.      Fertilization occurs inside mantle cavity

Key Functions:

o   . Testis: produces sperm
-                                            Vas deferens: transports sperm
o   Spermatophoric organ: forms spermatophores
o   Vas efferens: transports spermatophores
o   Spermatophoric sac: stores spermatophores

Unique Features:

1. Ciliated funnels for sperm transport

2. Spermatophore formation for efficient fertilization

3. Specialized storage sac for spermatophores

Mating Process:

1. Male transfers spermatophores to female's mantle cavity

2. Fertilization occurs inside female's mantle cavity

3. Female lays eggs, which are then fertilized

Key Functions:

-          Ovary: produces eggs

-          Oviduct: transports eggs

-          Oviducal gland: adds inner layer to egg case

-          Nidamental glands: add outer layer to egg case

-          Accessory nidamental glands: support nidamental gland function


Unique Features:

1.      Complex egg case structure

2.      Dual-layered egg case formation

3.      Ink staining for camouflage

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