Animals are _______________________ (can’t make their own food). All are ______________________. Almost all animals are invertebrates (99%). Range in size from microscopic to enormous whales. No cell walls. Most reproduce _____________________.
KINGDOM: _________________________
PHYLUM: __________________________
CLASSES: 1. _______________________ 2. _______________________ 3. ____________________
The term Porifera means _____________________. These organisms are all sponges.
CHARACTERISTICS
1. ____________________ - bodies don’t grow around a central point or axis - although some exhibit
______________________ symmetry.
2. Mostly ______________, although a few freshwater forms; all ________________.
3. All are _________________ (attached).
4. All are _________________ - cells are embedded in a gel-like __________ - like fruit in Jello.
5. Body with many ____________ (holes), ____________, and chambers that serve for the passage of _____.
6. Most of the inner chambers & surfaces lined with ________________.
7. Digestion is ________________________ and no _______________ or ______________ organs.
8. No organs or ______________________________. There are 2 layers of cells: _________________ &
________________________.
9. Skeleton made of _____________ - may either be calcareous(hard, white) or siliceous(glass-like). Skeleton may also
contain a protein called ________________________(soft).
10. No _______________ system.
11. ___________________ reproduction by _______ or ______________ (contain spicules & amoebocytes) and ______________reproduction by ___________ & _____________. Free-swimming, ciliated ____________. Sponges also have the ability to ________________________. Sponges are considered __________________ since they produce both sperm & eggs.
12. Three body forms exist asconoid __________________, syconoid ____________________, and leuconoid
_________________________________(this is the most advanced form).
13. Sponges have many __________________ pores for taking in water and only one ______________ pore for
releasing water. This pore is called an ____________________. The amount of water that enters a pore is
controlled by ____ pore cells. Water travels past the pore cells and reaches cells called ________________. The
______________ of these cells is used to filter out food. The ____________ of each collar cell helps to push
water along its path. Food is picked up by the _______________ which are responsible for digestion & distribution
of food. Water & waste particles are carried to a central cavity where they are swept toward the ________________.
ECONOMIC IMPORTANCE 1. 2.
CLASSES: 1. Calcispongiae - ______________ spicules - simple structure, relative shallow water sponges. Body forms ____________ & ___________.
2. Hyalospongiae - _______________ spicules – leucon type – mostly deep-sea species. Often known as the
glass sponges
3. Demospongiae - ______________ spicules, __________, or both – leucon type highly developed – typical
bath sponge.
Phylum Porifera evolved from _________________________________.