There are 24 ribs
13 pairs which consists of 7 pair "true" ribs and 6 pair "false" ribs.
False ribs are not attached to the sternum but only to the vertebrae of the spinal column. Their function is the same as the true ribs and that is protection of the heart, lungs, liver, spleen and part of the intestines.
to protect interior organs
Yes, both male and female rats have the same number of ribs, typically around 13 pairs. The rib cage structure is usually the same in both genders of rats.
it gives the ventral side of the ribs support
The costal cartilage of ribs in the human body serves to connect the ribs to the sternum, allowing for flexibility and movement during breathing.
to hold it's urine.
To help rats to breathe
To protect key organs in the chest such as the heart and lungs
The rib cage provides the most protection to the abdominal viscera. The ribs wrap around the viscera, such as the liver and spleen, helping to shield them from external trauma. The sternum at the front of the rib cage also contributes to protecting the organs in the abdominal cavity.
To nurse baby rats.