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Wewaii [24]
3 years ago
10

The trachea needs to be rigid but the esophagus does not. why is this

Biology
1 answer:
Alenkasestr [34]3 years ago
6 0
The esophagus has to be flexible to allow for food to travel from the mouth to the stomach
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Which of the following structures does a fern have, but a flatworm and a human don't? (Points : 1) mitochondria nucleus chloropl
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The light-dependent reactions include an electron transport chain system that works in a very
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When the high energy electrons move from the reactive center, they are conveyed from one chain protein to another as the energy in the electrons is harnessed to pump H+ ions from the stroma into the lamellae. The electron will ultimately reduce NADP+ to NADPH and the electrons in the reactive center will be replaced by high energy electrons from the splitting of a water molecule in photolysis. The energy of the sun is used to split the water molecule. The high energy electrons then undergo the same cycle as the previous electrons and the cycle continues.

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The sickle-shaped cells can also stick to vessel walls, causing a blockage that slows or stops the flow of blood. When this happens, oxygen can't reach nearby tissues. The lack of oxygen can cause attacks of sudden, severe pain, called pain crises. These attacks can occur without warning. If you get one, you might need to go to the hospital for treatment.

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