Taylor Hill, DJ Holland, Ashlan Gordon
❖ The nervous system plays a huge role in the functioning of our body. One of the functions it possesses is the nervous system collects sensory input from the body and external environment. Second, the nervous system then processes and interprets the sensory input. Finally, the third main function of the nervous system is to respond appropriately to the sensory input.
❖
❖
Brain / Compromises the body’s central nervous system, enables conscious communication with our body and automatic operation of vital organs. The brain also functions to keep your memory. /Spinal Cord / The spinal cord functions in helping us keep balance and it connects a large part of the PNS to the brain. Nerve impulses reaching the spinal cord through sensory neurons are transmitted up into the brain. /
Nerves / The collection of nerves (neurons) in the nervous system transmit signals between different parts of the body. These nerves function for us to be able to feel things. /
❖ Neurons are cells that process and transmit information taken from sensory organs through electrical and chemical signals. These cells transport stimuli. For example, stubbing your toe is a stimulation that gets processed and transported by neurons going upwards to the central nervous system. Almost instantly, neurons moving downwards will stimulate pain and a desire of its relief in the toe. Tissue in the nervous system is made of these neurons and glial cells. Nervous tissue recognizes stimuli and sends responding impulses to throughout the body. The central nervous system (CNS) has tissue in the brain and spinal cord. The peripheral nervous system (PNS) contains all the related and remaining tissue. The role of nervous tissue is to regulate body activities and processes, like memory, decision-making and emotions.
❖ The nervous system is made up of two smaller systems. The PNS is responsible for receiving signals from the body and sending them to the CNS. Positive feedback through the parasympathetic system.
❖ The nervous system works with every other body system. Skeletal: The brain regulates the position of bones by controlling muscles. Cardiovascular: Baroreceptors send information to the brain about BP. Muscular: Receptors in muscles provide the brain with information about body positions and movement. Endocrine: Hormones provide feedback to the brain to affect neural processing. Lymphatic: The brain can stimulate defense mechanisms against infection. Respiratory: The brain monitors respiratory volume and blood gas levels. Digestive: The autonomic NS controls the tone of the digestive tract. Reproductive: Reproductive hormones affect brain development and sexual behavior. Urinary: The bladder sends sensory information to the brain. The brain controls urination. Integumentary: Receptors in skin send sensory information to the brain. Nerves control muscles connected to hair follicles.
❖ Comparison/Contrast With Fishes, Amphibians, Reptiles, and Birds: