. A contribution to the physiology of the fresh-water sponges (Spongillidae). Sponges. 168 small number of particles in suspension in the surrounding water, the sponge will carry all particles captured into its amoebocytes with symbiotic algae, so into its digestive organs (Fig. 71); but, when the particles in suspension are very numerous, it will also carry a number of them within its amoebocytes, but soon „satisfied" will leave off, to simply eject them, directly after capturing (in or near the flagellated chamber), along the shortest way at the excurrent side of the chamber, of no cons
. A contribution to the physiology of the fresh-water sponges (Spongillidae). Sponges. 168 small number of particles in suspension in the surrounding water, the sponge will carry all particles captured into its amoebocytes with symbiotic algae, so into its digestive organs (Fig. 71); but, when the particles in suspension are very numerous, it will also carry a number of them within its amoebocytes, but soon „satisfied" will leave off, to simply eject them, directly after capturing (in or near the flagellated chamber), along the shortest way at the excurrent side of the chamber, of no consideration whether the particles are food or not (Fig. 73). We noiv can make tJie following diagram of the course of the (food-) particles captured hj a fresh-water sponge (imagine the often mentioned „intercellular plasmic groundsubstance" (chapt. F) in the places of the arrows). The pages of the text, in which the process was treated, and the figures referring to it are put in parenthesis. So we begin with the capturing in the choanocytes and the capturing in the plasmic layer at the outside of the flagellated chamber: capt. choanoc. (p. 143—46, 156) capt. plasm. layer o. flag, chamb. (Fig. 63, 65—68) ^^^^ (pjg_ 72_75) f p. 150-54, 156, 174). amoeboc. w. syml). alg. (p. 146—8; 156—8). digestion (Fig. 69—71) plasm, siibst. 0. exc. can. walls near flagell. chambers defecation (p. 166—68; 170) (Fig. 73) plasm, subst. o. exc. can. walls defecation, excretion (p. 161-66; 169—70) (Fig. 76, 77) I now want to point out some more accidental peculiarities: 1st. Just remember that we could stade a few times (p. 162— 165) that vacuoles together with feces also ejected unicellular, green algae, even green symbiotic algae. I want to mention this emphatically with a view to what I said, in the part about the chlorophyll of the fresh-water sponges, regarding a possible. Please note that these images are extracted from scanned page images that may have been digitally e
Size: 3196px × 782px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherleide, bookyear1919
