Sponges Outline Sponges Definition Sponges Structure Sponges Reproduction

Sponges

Outline �Sponges Definition �Sponges Structure �Sponges Reproduction � Sexual Reproduction � Asexual Reproduction �References

Outline �Sponges Definition Sponges Structure Sponges Reproduction Sexual Reproduction Asexual Reproduction References

Sponges Definition Sponges are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jellylike mesohyl sandwiched between two thin layers of cells.

Outline Sponges Definition �Sponges Structure Sponges Reproduction Sexual Reproduction Asexual Reproduction References

Sponges Structure � The simplest body structure in sponges is a tube or vase shape known as "asconoid“ � The body structure is characterized by a stalk -like spongocoel surrounded by a single layer of choanocytes. If it is simply scaled up � No tissues or organs are present, nor are there nerves or sensory organs.

Sponges Structure

Outline Sponges Definition Sponges Structure �Sponges Reproduction � Sexual Reproduction Asexual Reproduction References

Sponges Reproduction Sponges reproduce by : �Sexual Reproduction �Asexual Reproduction

Sexual Reproduction Most sponges are hermaphrodites (function as both sexes simultaneously), although sponges have no gonads (reproductive organs). Sperm are produced by choanocytes or entire choanocyte chambers that sink into the mesohyl and form spermatic cysts

Sexual Reproduction While eggs are formed by transformation of archeocytes, or of choanocytes in some species. Each egg generally acquires a yolk by consuming "nurse cells". During spawning, sperm burst out of their cysts and are expelled via the osculum

Sexual Reproduction

Outline Sponges Definition Sponges Structure �Sponges Reproduction Sexual Reproduction � Asexual Reproduction References

Asexual Reproduction Sponges produce asexually by: Budding Fission Regeneration

Asexual Reproduction Budding : In budding, numerous archaeocytes gather near the surface resulting in a small outgrowth on the pinacoderm. The bud thus formed grows outward to produce a small individual.

Asexual Reproduction Budding :

Asexual Reproduction Fission : In some sponges multiplication takes place by developing a line of fission and throwing off parts of the body which later can develop into a new sponge.

Asexual Reproduction Fission :

Asexual Reproduction Regeneration : All sponges possess a remarkable ability to regenerate lost parts. A piece cut from the body of a sponge is capable of growing into a complete sponge.

Asexual Reproduction Regeneration :

Outline Sponges Definition Sponges Structure Sponges Reproduction Sexual Reproduction Asexual Reproduction �References

References www. presentationszone. com https: //en. wikipedia. org www. asnailsodyssey. com www. iaszoology. com wwwstydyandscore. com