Answer:
The return of blood to the heart is assisted by the action of the skeletal- muscle pump. As muscles move, they squeeze the veins running through them. Veins contain a series of one-way valves, and they are squeezed, blood is pushed through the valves, which then close to prevent backflow.
One is in the area of psychopharmacology where drugs have been used to calm disorders in mood, sensation, thinking, and behavior. Second, the study of biological rhythms and sleep have been used to manage cases of insomnia. Thirdly, this overlap has helped Improve learning language and cognition in children with autism.
Answer:
marine west coast, humid continental, humid subtropical
Explanation:
this should be right.
Answer:
physical
Explanation:
science deals with physical things
The epiglottis is a flap in the back of your tongue that prevents food from entering the larynx. When your mouth is closed, the epiglottis is in place and blocks the larynx opening. If your mouth is open, the flap lifts and the larynx is no longer blocked so you can breathe. This is why it's important to not chew with your mouth open... if you do, then food can go down the larynx by mistake.
