1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Virty [35]
3 years ago
14

Why do veins also have valves?

Health
1 answer:
snow_lady [41]3 years ago
4 0

Answer:

the last choice.

Explanation:

veins have valves because venous pressure is often not great enough( as the blood must overcome gravity and other forces) to return the blood to the heart.

valves mainly prevent the back flow of blood.

You might be interested in
All fibers of the pectoralis major muscle converge on the lateral edge of the__________.
podryga [215]
<span>All fibers of the pectoralis major muscle converge on the lateral edge of the muscular system</span>
4 0
3 years ago
How does a diaphragm prevent pregnancy?
FinnZ [79.3K]

The diaphragm is a type of birth control. It is a shallow, bendable cup that is put inside the vagina. A diaphragm prevents pregnancy acting as a barrier for sperm to entry the cervix and joining an releases egg. Sometimes, diaphragm is used together with cream or gel that kills sperm.

4 0
3 years ago
The chart below shows four friends' target heart rate zones. During their last spin class, each person averaged 172 beats per mi
Art [367]
I think 183pm hope this helps
4 0
3 years ago
What health consequence is most likely to result from a diet high in saturated fats and refined sugars?
Nikitich [7]
The answer is heart disease. Eating a diet high in saturated fats and sugar definitely won't help you lose weight, nor would it help your sleep. If anything, it could make you lose sleep. Additionally, drug addiction is caused by using drugs, not eating food. By process of elimination, we find the answer is C. 
7 0
3 years ago
Erika wants to experiment with sugar cubes. which of the following causes a sugar cube to only change physically, not chemically
Natasha2012 [34]
Dissolving the sugar cube in water is a physical change. It doesn't alter the sugar's chemical structure like burning it or breaking it down with acid.
7 0
3 years ago
Other questions:
  • If you’d like to improve communication, one of the first things you
    8·2 answers
  • Which of the following is NOT a maternal benefit of breastfeeding?
    9·1 answer
  • Which is an example of peer pressure based on a "reasoning" tactic?
    15·2 answers
  • At the beginning of the 20th century, most nurses received their nursing training from
    8·1 answer
  • What type of group therapy could a person consider if wanting to go to therapy sessions with a spouse?
    5·2 answers
  • A call comes into the station at 0400 hours. The dispatcher sends your engine crew to a shelter for homeless people for an "ill
    12·1 answer
  • Identify three of the key messages used by advertisers when promoting their products
    8·2 answers
  • Im just curious. What does a person with no eyes experience. They can’t see darkness because they have no eyes or can they?
    5·1 answer
  • How to make a presentation on stress?
    15·1 answer
  • Being unable to play tennis due to extreme heat is an example of a(n) __________. A. cost factor B. personality factor C. equipm
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!