Explore the realms of the deep
The endless sea awaits
Dive inside a sponge
As balance its body demonstrates
While the exterior layer induces
water towards the sponge, the interior dimensions are the
processing system of all this water. Each cell in the interior
layers functions as an individual entity. However, these
entities converge to produce a sponge. To give an omniscient
perspective of a sponge's interior, we'll divide it into
two divisions. The first division is a central cavity, and
the second is the combination of the cells surrounding this
cavity. All the cells are essential for maintaining life.
Below are descriptions of the cells/ collections of cells
within a sponge. When the cells interact between and within
the two previously mentioned divisions, amazing things start
happening- animal life functions are performed within an
organism that was considered a plant until 1765!
Here is a list of the various
body parts of a sponge. Refer to the diagram on the page
to understand the text:
Archaeocytes- Within sponges, archaeocytes are an integral
and vital detail. Basically, they perform every single task
that the other types of cells do. However, they may transmute
into any type of cell to perform the tasks and fulfill the
necessities of the sponge. They transport nutrients, aid
in reproduction, etc, and they resemble amoebas.
2) Choanocytes- Thse
collared flagellate cells consist of a long, whip-like flagellum
and a collar of cells surrounding this. As the sponge filters
water through the spongocoel, the flagella capture food.
The movement produces the filtering process, moving the
water through the canals. Amazingly, these resemble a group
of protists known as choanoflagetta!
3) Sclerocytes- Sclerocytes
produce spicules by releasing such materials as calcium
carbonate, etc. Once such substances have been secreted,
they accumulate, generating a spicule.
4) Spongocytes- As could
be inferred, these cells produce the spongin fiber within
the sponge, hence the name.
This is a space found within the two layers. It contains
various parts of the sponge.
6) Atrial cavity- This
is a voluminous inner cavity which acts as the beginning
of the principle excurrent duct, also known as the osculum.
Depending upon structural grade, this cavity is less prominent
in dimensions as the sponge develops in complexity. All
water from canals usually flow through this area.