Search results
Results from the WOW.Com Content Network
Sponges were traditionally distributed in three classes: calcareous sponges (Calcarea), glass sponges (Hexactinellida) and demosponges (Demospongiae). However, studies have now shown that the Homoscleromorpha , a group thought to belong to the Demospongiae , has a genetic relationship well separated from other sponge classes.
Sponges also grown between rocks and boulders, providing a more stable environment and lowering the disturbance levels. [13] Sponges also provide habitats for other organisms to live in, without them, these organisms would not have a protected habitat. Scientists have discovered that sponges play an important role in the nitrogen cycle.
The sponges are inserted into the vagina in much the same way a tampon is, but when full are removed, cleaned, and reused, rather than discarded. The advantages of a reusable tampon alternative include cost-effectiveness and waste reduction. (Since sponges are biodegradable, even when a menstrual sponge's absorbent life is over it can be ...
They obtain nutrition from direct absorption of dissolved substances, and to a lesser extent from particulate materials. [5] There are no known predators of healthy reef sponges. [6] This is likely because the sponges possess very little organic tissue; the siliceous skeleton accounts for 90% of the sponge body weight. [5]
These are contrasting methods for the removal of food particles from a water flow: for example, by the gill rakers of fish, the baleen of whales, or the ostia of sponges. Filter feeding [ edit ]
The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.
The circulation of water brings in food particles and sperm, both of which are collected by choanocytes. In addition to the pinacocyte and choanocyte layers, sponges also have a non-living mesohyl layer that is located between the two living layers. Despite being made up of non-living material, the mesohyl contains living cells called archaeocytes.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!