The chapter “Locomotion and Movement” in UP Board Class 11 Biology explains how animals, including humans, move and maintain posture. It focuses on the human musculoskeletal system, comprising bones, muscles, joints, and ligaments, which work together to facilitate movement.
Students learn about the types of muscles—skeletal, smooth, and cardiac—and their structure, functions, and mechanism of contraction. The chapter also covers types of joints (ball-and-socket, hinge, pivot, gliding, and saddle), their movements, and the concept of antagonistic muscles.
Additionally, it highlights the role of skeleton in support, protection, and locomotion, and explains the sliding filament theory of muscle contraction. Understanding locomotion and movement is essential for studying human physiology, sports science, and biomedical applications. This chapter also forms a foundation for competitive exams like NEET, AIIMS, and CUET.