NDA & CDS 1 2026 Exam Biology โMCQ Class 2
Introduction The Circulatory and Excretory systems are two vital life-support systems of the human body that work in close coordination to maintain internal balance (homeostasis). The circulatory system ensures the transport of oxygen, nutrients, hormones, and waste products, while the excretory system is responsible for the removal of metabolic wastes and regulation of water and … Read more