Unit 2: Integumentary, Skeletal System & Joints

February 12, 2026

Semester 1
BP101T

Introduction to Integumentary, Skeletal System & Joints

Unit 2 focuses on the framework of the human body. The Skeletal system provides support/protection, while the Muscular system powers movement. The Integumentary system (Skin) is our first line of defense. This unit requires strong visualization skills—memorizing the names of 206 bones and understanding how thick and thin filaments slide to cause muscle contraction. Mastery of the Synovial Joint structure is particularly important for exams.

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Syllabus & Topics

  • 1Integumentary System: Structure and functions of skin (Epidermis, Dermis, Hypodermis) and skin derivatives (Hair, Nails, Glands).
  • 2Skeletal System: Classification of bones (Long, Short, Flat, Irregular), Functions of the skeleton.
  • 3Axial Skeleton: Skull, Vertebral column, Sternum, Ribs.
  • 4Appendicular Skeleton: Pectoral girdle, Upper limb, Pelvic girdle, Lower limb.
  • 5Muscular System: Organization of skeletal muscle, Physiology of muscle contraction (Sliding Filament Theory).
  • 6Neuromuscular Junction: Transmission of nerve impulse to muscle.
  • 7Joints: Structural & functional classification. Detailed structure of Synovial Joint.

Learning Objectives

Classify Bones: Categorize bones based on shape and location (Axial vs. Appendicular).
Explain Muscle Contraction: Describe the molecular mechanism of sliding filaments.
Describe Skin: List the layers of the epidermis and functions of the skin.
Draw Synovial Joint: Label the articular cartilage, synovial membrane, and fluid.
Understand Anatomy: Locate major bones like the Humerus, Femur, and Scapula

Frequently Asked Questions (FAQs)

Q1. What are the most important questions from Unit 2?

Frequently asked questions include: Structure and functions of Skin, Physiology of Muscle Contraction, Classify Joints with examples, and Structure of a Synovial Joint.

Q2. Do I need to memorize all 206 bones?

You should know the names and locations of major bones (such as bones of the skull, arm, leg, and pelvis). Generally, you do not need to memorize every minor bone marking unless it is specifically mentioned in the syllabus or previous exams.

Q3. How to explain muscle contraction easily?

Focus on the Sliding Filament Theory. Explain it using a simple flow:
Nerve Impulse → Calcium Release → Actin–Myosin Binding → Power Stroke → Muscle Shortening.