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Rom4ik [11]
3 years ago
9

Please please help!!!!!!

Biology
1 answer:
Kamila [148]3 years ago
8 0

how many words is it suppoed to be?


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A cage
raketka [301]
I think it’s B I’m not sure
7 0
3 years ago
What are the four important conditions of a respiratory surface
Ksivusya [100]

The four important characteristics of respiratory surface are:

1. Thin walls

2. Moisture

3. Large surface area

4. Blood supply

Respiratory system or respiratory tract is divided into upper and lower tract. Upper respiratory tract includes nose and its cavities, sinuses, pharynx and the part of the larynx. Lower respiratory tract consists of the trachea, bronchi, bronchioles and the alveoli.

Alveoli are the ends of the respiratory tract the smallest units in it. Alveoli are small folded air sacs that are branching off from alveolar ducts and providing an extremely large surface area for the gas exchange. Gas exchange occurs thanks to small blood vessels – capillaries that surround alveoli and it occurs via the process of diffusion.

So, respiratory surface is thin membrane also known as the blood–air barrier that consists of the alveolar epithelial cells, their basement membranes and the endothelial cells of the alveolar capillaries.

6 0
3 years ago
Which statements best describe the first stage of cellular respiration? Select three options
makkiz [27]
C because cellular respiration uses combine oxygen and other toxic waste.
8 0
2 years ago
I need help with this question- I put one answer but need to find the other
ale4655 [162]

Answer:

Proton and Energy

Explanation:

Your answer you choose is correct, you can cross out magma because that connects with lava not, nuclear functions, and vapor, since that connects with the water cycle.

Hopefully, it helps! (づ。◕‿‿◕。)づ

3 0
2 years ago
why do i exist?A. we don'tB. we are all in a simulationC. when a mommy and a daddy get together....D. long words
Mademuasel [1]
Being realistic, C is the right answer
7 0
2 years ago
Read 2 more answers
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