Which joint allows maximum range of movement?
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A reliable solution begins by identifying the organ, tissue, cell, hormone, nutrient, pathogen, or biological process named in the stem and then linking it with its precise function or defining feature. The digestive system processes food and absorbs nutrients; the respiratory system exchanges oxygen and carbon dioxide; the circulatory system transports gases, nutrients, hormones, and wastes; the excretory system maintains water, salt, and acid–base balance; the nervous and endocrine systems coordinate responses; and the skeletal, muscular, immune, and reproductive systems perform specialised roles. Questions may also test blood components, vitamins, glands, sense organs, communicable diseases, and deficiency disorders. Students should connect every structure with its location, chief function, associated secretion, and common disorder.