They are called valves, or leaflet valves in the veins, that interlock to prevent backflow of the blood.
Whether in the heart or a vein, the answer is a valve.
The veins have one-way valves to keep the blood moving in one direction. Skeletal muscle also helps with movement of blood through veins.
Valves, they are in the veins
valves
Valves
The vagina expands when Vern Nease blows out a gust of air into Beth's vagina flaps, therefore expanding the flaps on both sides, prior to sticking each of his three 10 inch penises into her vagina.
it flaps l9oll0ll00 e952a5+6t952955995495 EAT CHEASE
The forces on an aeroplane during take off.Firstly the pilot opens the throttle and the aircraft gradually begins to accelerate,meaning that the thrust force generated by the reaction of the exhaust gases overcomes the resisting drag force simultenousely with the two pressure systems on the aerofoil shaped wings{low pressure-above the aerofoil and relatively high pressure below the aerofoil}the two pressures increase inversely to each other thus when the pilot knows he has enough airspeeds {knots}he pulls on his 'yoke'{control column}the flaps swivel downwards inversely to the elevator 'flap panels' on the horizontal stabiliser surface which are on the aircrafts tail-plane.From Newton's third law of motion it states that 'FOR EVERY ACTION THERE IS AN EQUAL BUT OPPOSITE REACTION' with these flaps deflected into the 'wind' there is an increase in the pressure below the wing and a decrease in the pressure above the wing due to the angle of attack of the flaps.Due to this principle any amount of degree moved of the 'flap' the action of the wing deflecting the in coming air downwards{due to the aircraft's acceleration} the wing thus the aircraft receive a reaction generated by the deflecting of the in coming air which has direction and magnitude {vector quantity}.In simple terms the wing gets sucked from above and pushed from below.If this force generated by the action of the wing is greater than the opposing force which in the whole aircrafts total weight the resultant is a force called LIFT, the aircraft archieves additional acceleration due to reduced drag caused by ROLLING RESISTANCE by the wheels just to name a few when the landing gear in nolonger in contact with the runway.BY Proffesor Alexander Musonda.self pronouned professor.
The Atrioventricular Valves are the valves that stop back flow from the Ventricles to the Atria. In some images these valves may be shown to be attached to tiny muscles called Papillary muscles. These Muscles are continuous with the cardiac muscle of the heart walls. The AV valve on the left is called the Bicuspid (or Mitral) valve and the one on the right the Tricuspid valve. This is because the bicuspid has only two flaps (and looks like a bishops hat) whereas the tricuspid has three.
Newton's Cradle apply the Newton's 3rd Law. "For every action, there's an equal but opposite reaction" is the Newton's 3rd law. The action when the ball falls and strikes the others, the reaction is the ball on the other end of the cradle moving.
Valves?
a valve
Capillaries
Flaps of tissue that force unidirectional flow are called valves.
they're called valves. they are found in veins and also in the heart. hope this helped!
These are valves, and are found in veins to prevent blood from flowing backwards.
Both types of semilunar valve, aortic and pulmonary, have three cusps. These flaps make sure that blood only flows in one direction.
valves
Valves. Mitral and aortic.
In veins, there are valves that prevent back flow. <><><><><> There are also valves in the heart to force the blood to go in one direction only when the heart contracts.
cusps
There are bivalves in the human cardiovascular system have two "flaps" that help move the blood in one direction and prevent it from flowing back in the incorrect direction.