cell wall
The rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, most prokaryotic cells and some protozoan parasites, maintaining their shape and protecting them from osmotic lysis. In plants it is made of cellulose and, often, lignin; in fungi it is composed largely of polysaccharides; in bacteria it is composed of peptidoglycan; in protozoan parasites such as Giardia species, it's made of carbohydrates and proteins.
GO:0030312
external encapsulating structure
is_a
SPCC188.09c SPAPB15E9.01c SPCC306.11 SPAPB2C8.01 SPAC19B12.02c SPAC1002.13c SPAC1A6.03c SPBC19G7.05c SPAC17A5.04c SPBC1289.15 SPAC26H5.08c SPBC11C11.05 SPCC757.12 SPBC29A10.08 SPAC19B12.03 SPCC1322.10 SPAC1006.06 SPAC1039.11c SPCC1840.02c SPAC11E3.13c SPCC1795.09 SPCC63.04 SPCC63.02c SPAC1705.03c SPCC1281.01 SPBPJ4664.02 SPBC1348.08c SPBC428.03c SPBC32F12.11 SPAC1F8.06 SPBC947.04 SPBC21D10.06c SPCC1742.01 SPAC186.01 SPBP23A10.11c SPAC23D3.10c SPAC977.07c SPCC1450.09c SPAC13G6.10c SPBC21B10.07 SPBP4G3.02 SPAC1786.02 SPCC18.01c SPBC359.04c SPAC1F8.05 SPAC27D7.04 SPAC977.09c SPCC1223.12c SPBC2G2.17c