Label each system with its function in the human body muscular circulatory respiratory?

The muscular system is responsible for movement, posture, and generating heat through the contraction of muscles. The circulatory system transports blood, nutrients, oxygen, and waste products throughout the body, playing a key role in maintaining homeostasis. The respiratory system facilitates gas exchange, allowing oxygen to enter the bloodstream and carbon dioxide to be expelled, which is vital for cellular respiration.