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eduard
3 years ago
5

Answer ASAP 50 points

Biology
1 answer:
Mnenie [13.5K]3 years ago
3 0

Answer/Explanation:

In humans, we breathe in oxygen via the respiratory system. The oxygen enters the lungs. The air sacs in the lungs - the alveoli - are the site of gas exchange in the lungs and are where the circulatory and respiratory systems interact.

The alveoli take in the oxygen, where it diffuses into the capillaries (circulatory system). Blood, which passes through the capillaries takes this oxygen to all the cells in the body. Oxygen binds to haemoglobin in red blood cells, which transport it around the body.

Additionally, blood also transports carbon dioxide back to the alveoli of the lungs, where it diffuses into the lungs and is expelled when we breathe out

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Explanation:

4 0
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3 years ago
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If the nerve cell connecting the spinal cord to your feet is 1.4 m long, and the nerve impulse speed is 25 m/s, how many seconds
liubo4ka [24]

Answer:

Time taken by the nerve signal for travelling this distance = 0.056 seconds

Explanation:

Given,

The length of nerve cell connecting the spinal cord to the feet = 1.4 m

Speed of nerve impulse 25\frac{m}{s}

Time taken for  the nerve signal to travel this distance is equal to the total " length of nerve cell connecting the spinal cord to the feet" divided by "speed of nerve impulse"

Substituting the given values in above equation, we get -

\frac{1.4}{25}

= 0.056 seconds.

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3 0
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