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soldier1979 [14.2K]
3 years ago
5

Which choice is NOT part of the circulatory system?

Biology
1 answer:
ale4655 [162]3 years ago
5 0
The thyroid gland is not in the circulatory system

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The _____ sends out an electrical impulse that regulates the heartbeat.
olga nikolaevna [1]

Answer: The SA node

Answer choices are:

<span>A.      </span>The AV node

<span>B.      </span>The SA node

<span>C.      </span>The purkinje fibers

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The SA node<span> is the heart's natural pacemaker consisting of a cluster of cells located in the upper part of the wall of the right atrium. (the right upper chamber of the heart). The electrical impulses are produced and sent out from there to regulate heartbeat. This is also called the sinus code.  </span>

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Lamarcks idea of "acquired traits" Proposed that
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2 years ago
Does anyone know how to graph this? Please help I’m desperate
erastova [34]

Answer:Hopefully you feel comfortable with what a number line is. A graph is two number lines (called the x axis and the y axis) which cross each other at zero. A linear equation is a relationship between the two number lines. So if I gave you the linear equation “y=x”, this means if you pick a number on the x axis, the equation tells you what the number is on the y axis. So if you picked x=10, then you would know y=10. You can then draw a point at the co-ordinate (10,10), the point is there to tell you that the equation is true at that point. You can then pick another x, say x=9, then you know y=9 and you can put a point at (9,9), so you know the equation is true at that point also. You can do this with any number that you pick for x, and if you did that for every number, all the points you draw would turn into a line.

Explanation:

8 0
2 years ago
Describe three factors that contribute to how much damage is done to living tissue by radiation
yaroslaw [1]
I think that these factors are :the type of radiation , the duration of exposure to the radiation and the amount of radiation exposure. Radiation is commonly used to treat many medical conditions. Frequently used as a therapy for various forms of cancer, it is common for radiation to cause death of cells both cancerous and healthy cells in the areas irradiated. The extent of damage caused depends on the type of radiation irradiated, the duration of exposure and the amount of radiation.
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3 years ago
A toy car is placed at 0 on a number line. It moves 9 cm to the left, then 4 cm to the right, and then 6 cm to the left. What is
balandron [24]

Answer:

19 cm

Explanation:

The total distance traveled by the toy cay would be 19 cm.

<em>The total distance traveled should not be mistaken for total displacement. </em><u><em>W</em></u><u>hile displacement measures the distance and direction from the starting position of the toy car relative to its final position, the total distance traveled is calculated by adding all the movements of the toy car together.</u> Hence;

Total distance traveled = 9 + 4 + 6 = 19 cm

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