25 Questions
What is the function of the peristome?
To lead to the mouth
What is the name of the opening at the posterior end?
Cytopyge
Where is the cytostome located?
At the anterior end
What is the relationship between the peristome and the cytostome?
The peristome leads to the cytostome
What is the purpose of the cytopyge?
To expel waste
What is the main difference between Islamic and non-Islamic countries in terms of Taenia solium infection?
The prevalence of raw or poorly cooked pork consumption
What is the characteristic of the scolex of Taenia solium?
It has suckers and hooks
What is the term for the tapeworm segment that contains a median uterus filled with eggs?
Gravid proglottid
What is the other name for Taenia solium?
Armed tapeworm
What is the characteristic of mature segments of tapeworms?
They contain male and female reproductive organs
What is the shape of the egg of Echinococcus granulosus?
Round to oval
What feature is characteristic of the shell of the egg of Echinococcus granulosus?
Radially striated
What is the term for the six-hooked embryo inside the egg of Echinococcus granulosus?
Onchosphere
What is the number of hooks present in the embryo inside the egg of Echinococcus granulosus?
Six
What is the term for the egg of Echinococcus granulosus?
Ovum
What is the characteristic body shape of worms in this phylum?
Compact dorsally and ventrally
What is a unique feature of the reproductive system of these worms?
Mature segment with male and female reproductive system
How do these worms obtain nutrients from their host?
Through absorption from the host's intestine
What is absent in the body of these worms?
Digestive system
What is the term for the characteristic of having both male and female reproductive systems?
Monoecious
How many proglottids does Taenia solium typically have?
800-1000
What is the composition of Taenia solium?
Head, neck, and 800-1000 proglottids
What is a characteristic of the proglottids of Taenia solium?
They have both immature and mature forms
What can be found in the proglottids of Taenia solium?
Immature proglottid
What is the purpose of the proglottids in Taenia solium?
To reproduce and produce eggs
Study Notes
Egg (Ovum) of Echinococcus granulosus
- Shape: Round to Oval
- Radially striated shell
- Onchosphere (Hexacanth embryo) has:
- Six-hooked embryo inside the egg
- Anterior end: Groove (peristome) leading to mouth (cytostome)
- Posterior end: Small anal pore (cytopyge)
Characteristics of Phylum
- Compact bodies: Dorsally and ventrally
- Hermaphroditic helminthic (monoecious): Mature segment has male and female reproductive system
- No digestive system: No mouth, no gut, no anus
- Absorb food from host's intestine through tegument
- No alimentary canal
Taenia solium (Pork Tapeworm)
- Also known as armed tapeworm
- Found in many parts of the world where pork is eaten raw or poorly cooked
- Rarely found in Islamic countries
- Scolex (head) has:
- Suckers
- Hooks
- Composition:
- Head and neck
- 800-1000 proglottids
- Proglottids types:
- Immature proglottid
- Mature proglottid (contains male and female reproductive organs)
- Gravid proglottid (has a median uterus filled with eggs)
Learn about the shape and features of the egg of Echinococcus granulosus, including its radially striated shell and onchosphere embryo.
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