Final answer:
The slowly growing limb of the midgut is the caudal limb, which develops into the large intestine. In digestion, fat is primarily digested in the small intestine, and mesentery tissue structures maintain intestinal positioning.
Step-by-step explanation:
The limb of the midgut that grows more slowly is the caudal limb, and it forms the large intestine. During embryonic development, the midgut splits into two limbs out of which the caudal limb extends to form the transverse colon, descending colon, sigmoid colon, and ultimately the rectum. It is important to note that the cecum, which is the initial part of the large intestine, also gives rise to the appendix.
In the context of digestion, the majority of fat digestion takes place in the small intestine where bile acids emulsify fats, and pancreatic enzymes break them down for absorption. It is also worth mentioning that the mesentery tissue structures such as the falciform ligament and mesocolon hold parts of the intestines in place within the abdominal cavity.