It stops the water from going through your hair. That would cause a lot of friction. Friction slows you down a lot.
The movement of Chlamydomonas is smooth. It moves using two whip-like structures called flagella, which allow it to navigate through its aquatic environment in a relatively controlled manner.
smooth and cardiac muscles :D
Smooth Muscles & Cardiac Muscles
Swimming is mainly on your side to create less drag and allow you to move through the water faster
Jazz shoes allow more flexibility in movement during dancing. With a smooth rubber sole, they allow more fluid dance movement while providing shock absorption.
A smooth rounded end of the bone is called a condyle.
Skeletal or voluntary muscles attach to the skeleton and allow movement. In contrast, smooth muscles are not under voluntary control.
Veins contain valves which allow blood to flow only in the desired direction (toward the heart). Any muscular exertion in the body, any movement of arms and legs, etc., will incidentally put some pressure on the veins, forcing the blood to move in the direction which the valves allow.
in the arm there is a special bone called aclopises and alows you swim without your joint getting hurt.
Bones interact with each other through the joints, which allow for movement. At the joint, the ends of the bones are covered with smooth cartilage that helps reduce friction. Ligaments connect the bones and provide stability, while muscles and tendons around the joint help control movement.
An artery is a vessel with a thick medial layer, consisting of smooth muscle to allow for constriction or dilation in order to control blood flow through the vessel.
In biology, propulsion refers to the mechanism by which organisms move themselves through a medium, such as water or air. This can include methods like swimming, flying, or walking, which allow organisms to navigate their environment in search of food, mates, or shelter.