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Leno4ka [110]
2 years ago
14

The valves in the heart open and close to move blood in between heart chambers. O a) three directions O b) two directions O c) f

our directions d) one direction
Medicine
2 answers:
Alexxx [7]2 years ago
8 0

Answer:

B

Explanation:

The two chambers, the ventricles

Tom [10]2 years ago
5 0

Answer:B The two chambers, the ventricles

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Stains formed outside the tooth structure and are removable by a prophy.
ss7ja [257]

Answer:

The correct term is - extrinsic stain.

Explanation:

Extrinsic stains are normally present on the surface of a tooth and occur due to taking pigmented beverages such as coffee, tea, carbonated drinks, caramel coloring, and foods. Smoking cigarettes is also one of the reasons that can cause an extrinsic stain.

This can be removed by dentists or professionals like hygienists. The stain particles act on the outer surface of the teeth and pigmented them which cause stain yellowish or brownish in individuals.

Thus, the correct answer is - extrinsic stain.

8 0
3 years ago
Well trained athletes have sometimes a higher cardiac output than non-athletes. What is the reason for that?
Whitepunk [10]

Answer:

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Explanation:

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2 years ago
Identify a fluorescence-activate cell-sorting (FACs) instrument and its functions.
Bezzdna [24]

Answer: Measures the antigen levels on the cell surface

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8 0
3 years ago
19. You must always drive:
rewona [7]

under the speed limit..we must be careful not to drive too fast.

5 0
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Read 2 more answers
Select the better estimate of the width of a teacher's desk. The better estimate of the width of the desk is 10 meters or 1 mete
labwork [276]

Answer:

The answer is 1 meter because the 10 meters will be too long for a desk to be used by one person which is a teacher in this case. For a single person, one meter is a better estimate than 10.

A 10 meter wide table cen be used for a conference table where a lot of people can share the space .

4 0
3 years ago
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