The sphincter muscle, or ileocecal valve is located at the junction of the small and large intestine
Caecum
The appendix in humans is a structure that is not used in any way except to cause trouble. It is approximately located at the junction of the distal small intestine and proximal large intestine (aka - ileo-cecal).
The vermiform structure attached to the large intestine that is considered a vestigial organ is the appendix. It is a small, finger-shaped pouch located at the junction of the small and large intestine. While its exact function in the human body is not fully understood, it is believed to have a role in the immune system.
The small intestine stops (ends) at its junction with the large intestine just above the cecum. Its origin is from the stomach at the gastroduodenal junction. The first part of the small intestine is the duodenum.
The cecal part by a junction called iliocecal junction
The sphincter muscle, or ileocecal valve is located at the junction of the small and large intestine.
Large, blind sac that begins the lower intestine.
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.
The illiocecal valve
left iliac crest
The worm in the large intestine is a tape worm
Bacteria are found in the large intestine (strictly speaking, bacteria are found everywhere, but there are a particularly large number of them in the large intestine).