siphons
microtubules
The hollow tubes of protein that help maintain the shape of the cell are called microtubules. They are part of the cytoskeleton and play crucial roles in cell structure, cell division, and intracellular transport.
cytoskeleton
Fallopian tubes
The tubes responsible for bringing water up a plant are called xylem. The process by which water is transported through these tubes is known as transpiration, where water is absorbed by the roots and pulled up through the plant via capillary action and cohesion-adhesion forces.
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The tube from the bladder to the body's opening is called a urethra. The tubes from the kidneys to the bladder are called ureters.
Peristalsis is the progressive wavelike movement that occurs involuntarily in hollow tubes of the body, such as the digestive system. It helps propel contents through these tubes, like food through the esophagus or waste through the intestines.
Hollow tubes are used instead of solid steel tubes to reduce weight while maintaining structural strength. This makes them more cost-effective and efficient for various applications, such as construction, automotive and aerospace industries. Additionally, hollow tubes allow for easier passage of fluids, wires, or other elements through the center.
microtubules
The blood travels through veins, arteries, and capalaries.
Intake Manifold
These are called valves- some molluscs have two and are called BIVALVES, whilst others have three and are called TRIVALVES. The latter are held to be higher up the evolutionary scale. The bivalves are the clams, mussels, oysters and scallops. The adults all have two hinged shells (valves). Some of these animals circulate water carrying the microorganisms that they eat and oxygen for respiration through tubes called "siphons" that they can extend from between the shells on the anterior end so they can stay safely hidden in the mud or sand.
Hollow tubes are cylindrical structures that have empty spaces or cavities inside them. They are commonly used in various applications, such as piping, structural support, and biological systems. Examples include straws, blood vessels, and plumbing pipes.
The cytoskeleton is a network of hollow tubes made of proteins called microtubules that provide support and maintain the shape of the cell. They are involved in various cellular functions such as cell division, intracellular transport, and movement.
They are acoustic, inside is a diaphram that vibrates and amplifies sound passing it through the hollow tubes.
Stalagmites