In vascular plant, Xylem is one of the two tissue involve in transport water from roots to stems and leaves and also transports nutrients.
Two types of cells of this tissue are tracheids and vessel elements which are involved in transport.
<h3>What is the function of xylem ?</h3>
Xylem and phloem are known are two major vascular tissue.
Xylem tissue involve in transport of water and some nutrients from the roots to the leaves.
Phloem tissue involve transport of sucrose and other nutrients throughout the plant.
The passive transport called xylem sap occur through a long tube xylem cells.
The phenomenon where the xylem sap allow the flow upwards against gravity is called capillary action.
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1.Crash.
2.Disease.
3.Exponential growth.
4.Carrying capacity.
5.World population in 1800.
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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