The iliocecal sphincter
The ileum is the last (and longest) portion of small intestine. It empties into into the cecum (the first part of the "large intestine") at the iliocecal junction. The iliocecal sphincter is a ring of invountary smooth muscle at this junction, controlling the passage of digestive contents from the small intestine to the large intestine.
The pyloric sphincter
The ring of muscle that controls the passage of material from the stomach into the small intestine.
The pyloric sphincter regulates the passage of chyme into the duodenum (sm. intestine).
It is called pyloric sphincter and it regulates the passage of digested food from the stomach onto the duodenum ( small intestine ).
They are variable controls which can open to allow the passage of material and then closed to prevent further passage of materials. If you didn't have an anal sphincter you'd really have problems.
The medical term for circular muscle found in tubular structures that regulates the passage of substances is "sphincter." Sphincters act as valves to control the flow of fluids or materials through tubular structures in the body.
double layer phospholipids forms boundary between cell and surrounding environment and controls passage of materials into and out of cell
The iliocecal sphincterThe ileum is the last (and longest) portion of small intestine. It empties into into the cecum (the first part of the "large intestine") at the iliocecal junction. The iliocecal sphincter is a ring of invountary smooth muscle at this junction, controlling the passage of digestive contents from the small intestine to the large intestine.
depend on the kind of cell...... plant: cell wall and cell membrane/plasma membrane animal: cell membrane/plasma membrane
passage of materials through villi intothe blood
The cell membrane controls what enters and exits a cell.
Pylorus