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📘 What are Biological Systems?
- Biological systems are networks inside living things
- They work together to:
- Keep us alive
- Process energy
- Keep the body balanced
- In humans, there are 11 main organ systems
- In science, systems biology studies how life works at different levels:
- From tiny cells
- To whole ecosystems
👤 Human Organ Systems
- The body uses connected systems to stay alive and healthy
🧠 Nervous System
- Controls:
- Senses
- Body actions
- Movement
- Includes:
- Brain
- Spinal cord
- Nerves
❤️ Cardiovascular System
- Moves things around the body:
- Oxygen
- Nutrients
- Hormones
- Waste
- Includes:
- Heart
- Blood
- Blood vessels
🌬️ Respiratory System
- Helps you:
- Breathe in oxygen
- Breathe out carbon dioxide
🍎 Digestive System
- Breaks down food
- Takes in nutrients
- Gets rid of solid waste
🧪 Endocrine System
- Uses hormones to control:
- Growth
- Metabolism
- Development
🦴 Musculoskeletal System
- Gives:
- Structure
- Support
- Helps:
- Movement
- Protects organs
🛡️ Immune and Lymphatic System
- Fights infections
- Keeps fluid levels balanced
🚽 Urinary System
- Filters blood
- Removes waste
- Controls fluids and salts
🧴 Integumentary System
- Includes:
- Skin
- Protects the body
- Helps control body temperature
👶 Reproductive System
- Helps create new life (offspring)
🌍 Systems Biology & Levels of Life
🔬 Cellular Level
- Cells are the basic building blocks of life
- They process:
- Energy
- Genetic information
🧍 Organism Level
- A single living thing
- Human
- Animal
- Plant
- Microbe
- All body systems work together
🌱 Ecosystem Level
- Living things work together in groups
- They interact with:
- Each other
- The environment
🔗 Key Idea
- All systems are connected
- From cells → body → environment
- They work together to keep life going
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