Answer:
The correct answer would be d. thymus.
The thymus is a specialized lymphoid organ of an immune system.
It serves as the site for training and maturation of T-lymphocytes or T cells.
It is composed two identical lobes each containing outer region termed as cortex and inner region termed as medulla.
T-cells are first trained and selected in the cortex region via positive selection. In this, T cells which are able to bind to foreign antigens are selected and rest are degraded.
The selected T cells then move in the medulla region where they are selected by negative selection. In this, the T cells which binds to self-antigens are degraded and rest survive to become functional T cells.
<span>The earthworm's ventral vessel acts as a pump to push blood throughout the body.</span>
Answer:
Affecting the conservation of the product
Affecting the state of health of the dealer as it could decompose
To the overheating of the cell phone or technological device that the GPS guide gives you
Explanation:
This is a factor that usually occurs in cities, since by increasing the temperature severely, cities generate less air flow and a local temperature rise.
In addition, the cement is refractory, thus generating a further increase in temperature and the absence of trees due to infrastructure, which collaborates with everything previously mentioned.
Answer:
My favorite organ system is the digestive system
Explanation:
I am beyond fascinated on how our body breaks down food and nutrients. The way our stomach acid works and things like the mucus lining is all so interesting. I just love the "journey" our food takes through our bodies. Its like a food roller coaster!
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