Author Capstone Axis

Bones of the Upper Limb & Pectoral Girdle 💪 Pectoral girdle connects arms to the body. Each half has: 🔹 Clavicle (collar bone): Long, slender, curved bone 🔹 Scapula: Large triangular flat bone between ribs 2-7. Features: → Spine ridge → Acromion (clavicle attaches here) → Glenoid cavity (socket for humerus) Arm bones (see Figure […]

What Are Joints? Joints are connection points between bones (or bones and cartilage) that help us move. Muscles create force to move these joints, which act like levers! 🔧 Different joints allow different amounts of movement. 3 Types of Joints: Fibrous Joints: ❌ No movement allowed. Example: Skull bones fused by dense fibrous tissue (sutures).

Neural System Notes 🧠 Neural Control and Coordination 18.1 Neural System All animals have a neural system made of special cells called neurons 🧪 Neurons can detect, receive, and transmit different stimuli (signals) ⚡ Simple invertebrates (like Hydra 🪸) have a basic network of neurons Insects 🐜 have a better-organized system with a brain +

🧠 Human Neural System: Control & Coordination ⭐ Key NEET Concepts CNS vs. PNS: Central (brain + spinal cord) vs. Peripheral (all body nerves) Nerve Fibre Types: Afferent (body → CNS) vs. Efferent (CNS → body) PNS Divisions: Somatic (voluntary muscles) & Autonomic (involuntary organs) Autonomic Subtypes: Sympathetic & Parasympathetic systems Neuron Structure: Cell body

Neuron: The Building Block of Your Nervous System 🧠 Neurons are special cells that detect, receive, and send signals in your body. They’re the structural and functional units of your nervous system! 🧩 Parts of a Neuron Cell body: The control center with cytoplasm, nucleus, and Nissl’s granules (special protein-making granules). Dendrites: Branch-like structures carrying

🧠 Central Neural System: Your Body’s Command Center 🌈 What Does the Brain Do? The brain is your body’s command and control system! It: 🧠 Controls voluntary movements (like waving 👋) ⚖️ Maintains body balance ❤️ Runs involuntary organs (heart, lungs, kidneys) 🌡️ Manages body temperature (thermoregulation) 🍔🧋 Regulates hunger and thirst ⏰ Controls 24-hour

Chapter 19: Chemical Coordination and Integration 🤝 Why We Need Chemical Coordination Our body has two teamwork systems: ⚡ Neural system: Super-fast messaging (like texting!), but effects are short-lived. Nerve fibers can’t reach every cell. 🐢 Endocrine system: Slower but long-lasting coordination using hormones. It fills in where nerves can’t reach! Together, they regulate body

🌟 Human Endocrine System 🌟 The endocrine system includes glands and tissues that make hormones to control body functions. Major glands are: 🧠 1. Hypothalamus Location: Base of the brain Hormones: Releasing hormones (start pituitary hormones) & Inhibiting hormones (stop pituitary hormones). Example: GnRH tells the pituitary to make gonadotrophins. Fun fact: Uses blood vessels

Hormones Beyond Endocrine Glands ❤️ Heart Hormone Atrial Natriuretic Factor (ANF): Made by the heart’s upper chambers (atria) Job: Lowers high blood pressure by relaxing blood vessels ✨ Cool fact: Your heart acts like a pressure sensor and hormone factory! 🫘 Kidney Hormone Erythropoietin: Made by special kidney cells (juxtaglomerular cells) Job: Tells your body

Biology Notes: Hormone Action Mechanism Mechanism of Hormone Action Understanding how hormones communicate with your body’s cells 🌟 What Are Hormones? Hormones are special chemical messengers that help coordinate and regulate your body’s functions. They travel through your bloodstream to target tissues where they trigger specific actions. These amazing chemicals help control things like your