Protozoa
Protozoa
General Properties of protozoa Protozoa are one-cellled animals with full vital functions They may be freeliving or parasitic Protozoa are minute parasites and can only be visualized under the mIcroscope
▪ General Properties of protozoa ▪ Protozoa are one-celled animals with full vital functions. ▪ They may be freeliving or parasitic. ▪ Protozoa are minute parasites and can only be visualized under the microscope
Basic structure Protozoa, the whole body consists of a singular cell. a protozoan cell is composed of 1)plasma membrane n2) cytoplasm:a. ectoplasm(外质)b endo|asm(内质) nucleus
Basic structure ▪ Protozoa, the whole body consists of a singular cell. A protozoan cell is composed of : ▪ 1)plasma membrane ▪ 2)cytoplasm : a. ectoplasm(外质) b. endoplasm(内质) ▪ 3)nucleus
Life cycle patterns One-host form( direct) One stage form - Trophozoite Two stage form-Trophozoite& Cyst TWO-host form(indirect) Mammals mammals Mammals insect vectors
Life cycle patterns One-host form (direct) One stage form – Trophozoite Two stage form – Trophozoite & Cyst ▪ Two-host form (indirect) Mammals --- mammals Mammals --- insect vectors
Locomotion(运动) flagella(鞭毛) cilia(纤毛) pseudopodia(伪足
▪ Locomotion(运动): ▪ flagella(鞭毛) ▪ cilia(纤毛) ▪ pseudopodia(伪足)