spinal cord
Fissure
The narrow ridge of a bone is called a crest. It is a raised area of the bone's surface that can serve as an attachment point for muscles, tendons, or ligaments. Crests are important for providing structural support and stability to the bone.
The long narrow bone in the lower part of your leg is called the fibula.
Slot
The pharynx is the narrow opening at the back of the mouth. It is part of both the digestive system and the respiratory system.
bone marrow produces blood cells
of Sinus, An opening; a hollow; a bending., A bay of the sea; a recess in the shore., A cavity; a depression., A cavity in a bone or other part, either closed or with a narrow opening., A dilated vessel or canal., A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice., A depression between adjoining lobes.
bone narrow
Yes, waves can bend as they pass through a narrow opening. This phenomenon is known as diffraction. The degree of bending depends on the wavelength of the wave and the size of the opening.
crack!
The Mediterranean
The urethra.