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dalvyx [7]
3 years ago
14

The primary purpose of heart valves is to

Health
2 answers:
Umnica [9.8K]3 years ago
8 0

Answer:

A

Explanation:

i'm not sure but i think it is A

Svet_ta [14]3 years ago
8 0

Answer:

prevent blood from flowing backward

Explanation:

think of the heart as the panama canal. There are four chambers, the atria and the ventricles. It goes from right atrium to right ventricle, and then to the lungs, where it gets oxygen, and then into the left atrium and finally into the left ventricle which pumps the blood through the aorta into the systemic circulation. Valves prevent backflow of the blood, they open and close at difference stages of the heart cycle.

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Which description best defines the nervous system and its two main branches?
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6 0
2 years ago
2.A car travels 43 miles on one gallon of petrol. How far will it travel on seven gallons?
Deffense [45]

Answer: 2.) 301 miles (3) 30 minutes

Explanation:

2)

Distance traveled per gallon of petrol = 43 miles

Distance traveled on 7 gallons ;

43 × 7 = 301 miles

3)

time taken to cover distance = 45minutes = 45 / 60 = 0.75 hour

Speed of travel = 80km/hr

Recall:

Distance = Speed × time

Distance = 80km/hr × 0.75hr = 60km

Therefore, time required to cover the same distance at 120km/hr equals :

Time = distance / speed

Time = 60km / 120km/hr = 0.5 hr

= 0.5 × 60 = 30 minutes

4 0
3 years ago
3. The heart has four chambers and is divided into a right and left side by a muscular wall called
dezoksy [38]

Answer:

The answer is true.

Explanation:

Your heart has 4 chambers. The upper chambers are called the left and right atria, and the lower chambers are called the left and right ventricles. A wall of muscle called the septum separates the left and right atria and the left and right ventricles.

3 0
3 years ago
Read 2 more answers
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