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3241004551 [841]
3 years ago
7

How many classes of vitamins is their

Health
2 answers:
dalvyx [7]3 years ago
8 0
There are 13 classes of vitamins
krek1111 [17]3 years ago
5 0

Answer:

13

Explanation:

They are vitamins A, C, D, E, K and the B vitamins (thiamine, riboflavin, niacin, pantothenic acid, biotin, vitamin B-6, vitamin B-12 and folate). You can usually get all your vitamins from the foods you eat.

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3 years ago
The____ complex represents the time necessary for the impulse to travel through the bundle of His, the bundle branches, and the
Artyom0805 [142]

Answer:

a. QRS

Explanation:

In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

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The right atrioventricular valve (AV) comprises of three (3) leaflets (flaps) which opens and closes in order to allow for the flow of blood from the right atrium of the human heart to the right ventricle. Also, the right atrioventricular valve is saddled with the responsibility of preventing blood from flowing backward in the mammalian heart.

The QRS complex represents the time necessary for the impulse to travel through the bundle of His, the bundle branches, and the Purkinje fibers to complete ventricular activation or contraction, known as ventricular depolarization. QRS is simply a combination of the Q-wave, R-wave and the S-wave which represents electrical impulses.

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3 years ago
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ra1l [238]

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Read 2 more answers
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