Phylom Phoronida12345678769966689867.pdf

For zoology

1. Phylom
Phoronida
Presented by:
MJ G. Tesoro

2. kingdom: Animalia
Pylum: Phoronida
Family: Phoronidae
Genus: Phoronis
Common nam: horseshoe
worm
Species: ovalis

3. These species live in most of
the oceans and seas
including the Arctic Ocean
but excluding the Antarctic
Ocean, and between the
intertidal zone and about 400
meters down.

4. These are the general characteristics of phylum
Phoronida also known as horseshoe worm
1
The size of Phoronids or
Horseshoe worm are 2 to 29
cm long and 1.5 mm wide.
2
Soft body. Their skins have no
cuticle but secret rigid tubes
of chitin
3
Anterior umbrella-like body region
(pre-oral hood).
General
characteristics
4 Middle body region is the collar.
5
Ring of tentacles along posterior
boundary

5. BODY PARTS & FUNCTION
1
There tentacles are connected to Lophoral organ use
for filtering, respiration and used for capturing the
plankton, the tentacles was also used to protect
themselves by withdrawing inside there tubes.
Epistome was used to cover there mouth.
Nephridium for removal of excretory waste both from
blood and coelomic fluid.

6. There nervous system that
consists of a dorsal ganglion, a
tentacle nerve ring, an inner
nerve ring, intertentacular
groups of perikarya, and
tentacle nerves. These
tentacles nerves have three
groups: abfrontal, frontal, and
laterofrontal.
They have a U-shaped gut,
meaning their anus is close in
distance to their mouths and
their digestive tract consists of
three parts: the mouth, the
stomach, and the anus.
Nervous and
digestive system
2

7. REPRODUCTION
3
Phoronids reproduce sexually.
1. Mating: During mating, the male and female
phoronids release their gametes into the water. This
process is called external fertilization.
2. Sperm and egg fusion: The sperm swims towards
the egg, and fertilization occurs externally in the water
column.

8. THANK
YOU!