The correct answer is:
A. carry out photosynthesis
The right atrium receives all of the systemic venous return Beneath the diaphragm, systemic venous flow enters the inferior vena cava, that is, blood from the abdominal and pelvic regions and the lower limbs.
In medicine, the hygiene hypothesis states that early childhood exposure to particular microorganisms (such as the gut flora and helminth parasites) protects against allergic diseases by contributing to the development of the immune system.
<h3>What is the role of eosinophils in hygiene hypothesis ?</h3>
Eosinophils are multifunctional granulocytes that contribute to initiation and modulation of inflammation.
- Eosinophils are extremely versatile effector cells that damage tissues or modulate the activity of other immune and stromal cells.
<h3>Why does having a parasitic worm help us ?</h3>
This is because parasitic worms have evolved strategies to block parts of the human immune system.
- These parts of the immune system, namely the eosinophils and IgE antibodies, are also the main players in allergies, IBD, and many other inflammatory diseases
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<span>1) something that is situated away from or classed differently from a main or related body.
2) a statistical observation that is markedly different in value from the others of the sample
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