, formerly known as mesenchyme, is the gelatinous matrix within a sponge
. The mesohyl resembles a type of connective tissue
and contains several amoeboid cells
such as amebocytes
, as well as fibrils
For hundreds of years, it has been largely accepted that sponges lack true tissue
, but it is currently debated as to whether mesohyl and pinacoderm
layers are in fact tissues.
- Lytle, Charles F., and John R Meyer. General Zoology Laboratory Guide, Fourteenth Edition. New York: McGraw-Hill, 2005.