Flashcards in chapter 35 section 1 Deck (17)
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1
what is a collar cell
flagellated cell that lines interior of sponge
2
osculum
the opening at the top of the sponge
3
spicule
tiny, hard particles of calcium carbonate or silicon dioxide that are often shaped like spikes
4
calcium carbonate
CaCO3
5
Silicon Dioxide
SiO2
6
amebocyte
crawling cell that brings nutrients to the rest of the body.
7
invertebrates are animals that lack
a backbone
8
adult sponges are sessile, which means that they
attach to a surface and do not move
9
collar cells perform 3 functions
pumps water into the interior of the sponge
engulfs and digests food that is filtered from the water
passes nutrients to amebocytes
10
sponges eliminate carbon dioxide and cellular wastes by
allowing them to diffuse into the water that passes through the sponge
11
after a sponge egg is fertilized, it develops into a
larva
12
explain why there is so much diversity among invertebrates
it only has to lack a backbone to be an invertebrate
13
what are the two substances that a sponge's skeleton may be made of
spongin and spicules
14
how do spongin and spicules differ
spongin is a network of protein fibers
spicules are tiny, hard particles of calcium carbonate or silicon dioxide that are shaped like spikes
15
how do collar cells participate in the sexual reproduction of sponges
collar cells in a sponge engulf the sperm and transfer them to amebocytes which carry the sperm to the egg
16
why is hermaphroditism beneficial in sponges even though they rarely self fertilize
the chance of successful fertilization is higher
17
