yes, of course they do. Humans are mammals.
Excretion
kidneys
kidneys
The ureter is the tube that leads from the kidneys to the bladder (in mammals).
Yes, but in mammals it is a minor function. (In salt water fish it is their major function.)
The excretory system of meerkats is similar to that of other mammals. They have kidneys and a urinary bladder, and their urine is liquid.
The kidneys in most mammals are enclosed in fat primarily for protective and insulating purposes. The fat layer, known as perirenal fat, cushions the kidneys against physical trauma and helps maintain their position within the abdominal cavity. Additionally, the fat serves as an energy reserve and aids in thermoregulation, helping to keep the kidneys at a stable temperature. This protective adaptation is crucial for the kidneys' vital role in filtering blood and maintaining homeostasis.
A mouse has two kidneys, just like most mammals. These kidneys are responsible for filtering blood, removing waste, and regulating fluids in the body. Their size and structure are adapted to the mouse's small body, functioning efficiently to maintain homeostasis.
Mammals, including humans, have bladders located within their lower abdomen. The bladder is a muscular organ that stores urine produced by the kidneys until it is released from the body through the urethra.
Pigeons, like most birds, have two kidneys. These kidneys are responsible for filtering waste from the bloodstream and regulating water and electrolyte balance, which is crucial for their metabolism and overall health. The structure and function of avian kidneys differ somewhat from those of mammals, reflecting their unique adaptations for flight and other physiological needs.
Roosters do not have "nuts" in the same way that mammals do. Instead, they have testes, which are internal and located near the kidneys. These testes produce sperm and hormones but are not externally visible like the testicles of many mammals.
Kidneys. "Mammals have highly developed kidneys that help control the composition of body fluids... The kidneys of mammals help maintain homeostasis by filtering urea from the blood, as well as by excreting excess water or retaining needed water."References:Miller, K. R., & Levine, J. (2006). Biology. Boston, MA: Pearson Education.