The arrangement of blood flow in the limbs of penguins is that of a counter-current exchange system where the cold blood coming from limbs flows parallel but in the opposite direction then the hot core-temperature blood coming from the heart. As the the hot blood flows outward it re-warms the venous blood which in turns cools down the arterial blood.
The flap of tissue that prevents blood from flowing backward is called a valve. Valves are found in veins and in the heart to ensure that blood flows in one direction and does not pool or backflow.
A flap-like lateral wall of each atrium is called the auricle. Its purpose is to increase the atrial volume, thereby increasing the efficiency of blood flow into the ventricles.
These one-way 'doorways' are called valves. They exist in places such as the heart and the oesophagus/stomach opening.
Birds flap their wings in place to maintain balance, regulate body temperature, and strengthen their flight muscles.
The epiglottis is a small, leaf-shaped flap of cartilage located behind the tongue at the base of the tongue. Its main function is to prevent food and liquid from entering the trachea during swallowing by covering the entrance to the windpipe.
Elephants have large, thin ears with a network of blood vessels. To cool down, they flap their ears, causing air to flow over the vessels and help regulate their body temperature. This process cools the blood circulating through their ears before being sent back to the rest of the body.
penguin
penguin
penguin
a flap of tissue that prevants blood from flowing backward is
penguin
Put on a purple polka dotted suit, then hop around and flap your arms like a penguin.
elaphants flap their ears to keep their blood cool ,and it goes through their bodies to keep them cool.
they flap them and then they have a nice breeze because they are so big=) CORRECT ANSWER: The tissue in a elephant's ears is very thin with large blood vessels right at the surface. When an elephant is too warm, their overheated blood travels through the large vessels in the ear. By flapping their ears, the surface area cools a bit and excess heat from the blood is released into the air. In this way, the blood is cooled down and then recirculated into the elephants body, helping keep their body temperature down. This cooling strategy is aided by the size of the ears and the speed at which an elephant moves it ears.
valve
Penguins flap their flippers to swim underwater, like birds flap their wings to fly through the air. They paddle with their webbed feet when floating on the surface.
your skin of course!