Bones
Urine does not belong in the given list as it is a waste product excreted by the kidneys, while bones, smooth muscle, and foodstuffs are all related to the human body's structure or nutrition.
Smooth muscle surrounding the bladder pushes urine out of the urethra.
Yes, the bladder is an organ. It's made up of multiple tissues (e.g. columnar epithelium, smooth muscle) that have a single fuction (storing and eliminating urine).
The movement of urine primarily relies on the action of smooth muscle in the walls of the ureters and the bladder. The ureters use peristaltic contractions to transport urine from the kidneys to the bladder. Once the bladder fills, its smooth muscle, known as the detrusor muscle, contracts to facilitate urination. Additionally, the external urethral sphincter, composed of skeletal muscle, allows for voluntary control over the release of urine.
peristalsis
Smooth muscle tissue is primarily found in the walls of hollow organs and structures within the body. This includes the gastrointestinal tract, blood vessels, the bladder, and the uterus. Unlike skeletal muscle, smooth muscle is involuntary and helps facilitate processes such as peristalsis, blood flow regulation, and the expulsion of urine.
Peristaltic wavesThe ureters move urine from the kidneys to the urinary bladder by a mechanism known as peristalsis. Peristalsis is a wave-like series of smooth muscle contractions. The ureters have an inner lining of smooth muscle that carries out peristalsis in order to move urine to the bladder.
The detrusor muscle is the main muscle within the bladder that contracts during urination to help expel urine. It is a smooth muscle that forms a triangular shape at the base of the bladder.
The ureters move urine from the kidney to the bladder by something known as peristalsis. This is a wave like series of muscle contractions. The lining of smooth muscles in the ureter move the urine to the bladder.
Detrusor muscle is found in the urinary bladder.
The muscle that compresses the urinary bladder during micturition is the detrusor muscle. This smooth muscle layer surrounds the bladder and contracts to expel urine from the bladder into the urethra. The contraction of the detrusor muscle is primarily controlled by the autonomic nervous system, specifically the parasympathetic division.
Urinary bladder mainly contains two types of musces 1. Smooth muscles, forming the wall of the bladder ( Detrusor muscle ) and the internal urethral sphincter ( which controls the flow of urine which is involuntary ), and 2. Skeletal muscle, which forms the external urethral sphicter with which we can control the flow of urine.. ( voluntary control of flow )