the immune system
Lungs and respiratory system
The thymus is the lymphatic system organ that involutes and becomes non-functional as aging occurs. It is responsible for T cell maturation, but its activity declines with age, leading to reduced immune function.
A functional system refers to a collection of organs that work together to perform a specific physiological function, such as the digestive system or the respiratory system. It is characterized by the coordination of structures and processes to achieve a common goal within the body.
The word "organ" in both "organism" and "organ system" reflects the structural organization and functional specialization found in living organisms. In an organism, organs are structures made up of tissues that perform specific functions. In an organ system, multiple organs work together to carry out complex physiological processes necessary for the organism's survival.
The first organ to develop in the embryo is the heart. In a fetus, there is a brain, but it isn't fully developed and can't understand signals from the nervous system. Therefore the first functional organ would be the heart. But the first thing to start developing in a fetus is the nervous system. ( no that isn't an organ )
parenchyma
No, a nephron is not an organ. It is the basic structural and functional unit of the kidney and filters excess salt and water from the blood. The kidney is the main organ of the urinary system. Without a kidney, your body cannot create urine and you blood must be filtered with a dialysis machine.
The squiddley spooch.
YES it is an organ system?
The functional elements in a system software defines the architectural elements that delivers the functionality of the system. The functional elements in a system software includes functional capabilities, functional design philosophy, external interfaces, and functional capabilities.
Skin is an organ, not an organ system. It is part of the integumentary system.
Organ System