Nethma_Blog

 Nervous system What Is the Nervous System? The nervous system  includes the brain, spinal cord, and a complex network of nerves . This system sends messages back and forth between the brain and the body. The brain is what controls all the body's functions. The spinal cord runs from the brain down through the back. The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis. Functions of  Nervous System. Your nervous system’s main function is to send messages from various parts of your body to your brain, and from your brain back out to your body to tell your body what to do. These messages regulate your: Thoughts, memory, learning and feelings. Movements (balance and coordination). Senses (how your brain interprets what you see, hear, taste...

Human excretory system  The main excretory organs include  kidney, ureter, urinary bladder and urethra . Kidneys filter the blood and urine is the filtrate obtained. Urine passes to the urinary bladder via ureter and is expelled out of the body. This is known as micturition.                                            Kidneys Kidneys are the main organ of the human excretory system. Also, every individual has a pair of kidneys. They  are located  one on each side of the spine at the level of the liver.                                            Ureters There is one ureter that comes out of each kidney as an extension of the renal pelvis. It is a thin muscular tube that carries urine from the kidneys to the bladder. Urethra The urethra is a tube that ar...