nataliemandisi2005 nataliemandisi2005

04-09-2020
Biology

contestada

Explain how valves help the transport of blood in veins.

Respuesta :

nazz1010 nazz1010

04-09-2020

Answer:

The valves' main job is to keep the blood moving in one direction – back up towards the heart. When the valve is open, blood freely flows upward towards the heart and when the valves are closed, blood cannot flow back

Answer Link

Otras preguntas

why is nh3 classified as a polar molecule

Can anyone figure this out

how many dogs are in the river

I'm confused on how to solve the triangle. can someone help me please?

I need help here’s a picture of the question

Monopolies were legal in the United States until a)the 1860s. b)the 1870s. c)the 1880s. d)the 1890s.

16x^2-16x=5 solve the equation by completing the square

The adventures of Tom Sawyer, chapter 1 (excert) Please hurry!!!! What does Tom do to prevent aunt Polly from finding out that he ate her jam? A) Tom hides und

Which two statements are true about a system? 1. A system is a group of objects analyzed as one unit. 2. Energy that moves across system boundaries is conserved

Select the two binomials that are factors of this trinomial x^20 - x - 20