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Greeley [361]
2 years ago
10

The volume of air in the lungs is controlled by the​

Biology
1 answer:
marin [14]2 years ago
5 0
The diaphragm,

During inhalation, the diaphragm is contracted which increases the volume of the lung cavity. During exhalation, the diaphragm is relaxed which decreases the volume of the lung cavity
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Endocrine cells
Lemur [1.5K]

b

I am not that sure but I think endocrine cell don't contain blood vessels

8 0
3 years ago
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The sternal angleis the least likely part of A. the sternum to fracture in the elderly. B. occurs at the sternoclavicular joint.
Bumek [7]

Sternal angle marks the joint between the sternum and the 2nd rib.

Option E.

<h3><u>Explanation:</u></h3>

Sternum is the breast bone which is a dorsi ventrally flattened bone present in thorax of human. It gives the support for the ribs where the ribs join. A sternum has three parts - Manubrium sterni, body of sternum and the xyphoid process.

The sternum has attachments of a total of 10 ribs and clavicle. The clavicle and the first rib joins in the Manubrium sterni, and the 3rd to 10th rib joins in the body of sternum. The 2nd rib joins in a facet which is partly in Manubrium sterni and partly in body of sternum. This place id also called the sternal angle. So the sternal angle marks the joint of 2nd rib to sternum.

3 0
4 years ago
What is the speed of a wave with a wavelength of 3 m and a frequency of .1 Hz? 0.03 m/s 0.3 m/s 3.1 m/s 30 m/s
Natasha_Volkova [10]

Answer:

The correct answer is option b, 0.3m/s

Step by Step solution:

The relation between speed, wavelength and frequency of a wave is given by the following equation:  

Speed = Wavelength x Frequency

Substituting the values in above equation we get –  

= 3  x 0.1  

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7 0
3 years ago
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During metamorphosis, what structures do tadpoles lose?
koban [17]

Answer:

C. They lose their gills

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3 years ago
Meiosis is of evolutionary signicance as it
Ludmilka [50]

Answer:

d

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