Excretion
Dolphins are not different from other mammals when it comes to the excretory system. They excrete waste such as urine or faeces through the bladder or anus.
The excretion of faeces begin with the stomach where the food is broken down. There are three chambers in the dolphin’s stomach. Food is stored in the first chamber where is it partially broken down. Then the majority of digestion takes place in the second chamber, this is where the nutrients are taken out and stored in the third chamber, the pyloric stomach. The waste is then passed along the large intestine and then out through the anus.
Dolphins drink salt water to keep their blood diluted, but they still have to get rid of all the salt. Their kidneys remove excess salt by filtering the blood and what isn’t absorbed by the kidneys is passed into the bladder and then out as urine. A dolphin’s urine has a high concentration of salt.
The excretory system also consists of the lungs which excrete CO2, the circulatory system which excretes waste from cells and the digestive system which excretes saliva and digestive juices.
The excretion of faeces begin with the stomach where the food is broken down. There are three chambers in the dolphin’s stomach. Food is stored in the first chamber where is it partially broken down. Then the majority of digestion takes place in the second chamber, this is where the nutrients are taken out and stored in the third chamber, the pyloric stomach. The waste is then passed along the large intestine and then out through the anus.
Dolphins drink salt water to keep their blood diluted, but they still have to get rid of all the salt. Their kidneys remove excess salt by filtering the blood and what isn’t absorbed by the kidneys is passed into the bladder and then out as urine. A dolphin’s urine has a high concentration of salt.
The excretory system also consists of the lungs which excrete CO2, the circulatory system which excretes waste from cells and the digestive system which excretes saliva and digestive juices.