Human Anatomy Notes – Blood, Brain, Skeleton & Nutrition Guide

Blood and minerals deficiency Our blood is made up of red blood cells (RBCs), white blood cells (WBCs), platelets, and plasma . To stay healthy, it requires essential minerals like iron, calcium, potassium, sodium, zinc, magnesium, and copper . When these are lacking, the body develops deficiencies that affect health. 1. Blood Deficiency This usually refers to anemia , a condition where the blood lacks enough healthy red blood cells or hemoglobin. Hemoglobin (protein in RBCs) carries oxygen throughout the body. Without enough hemoglobin, tissues don’t get sufficient oxygen, leading to fatigue and weakness. Causes: Iron deficiency (most common) Vitamin B12 or folate deficiency Chronic diseases or blood loss Symptoms: Pale skin, tiredness Dizziness, shortness of breath Rapid heartbeat, brittle nails, hair fall 2. Mineral Deficiency Minerals are vital for bone strength, muscle function, nerve signaling, fluid balance, and making blood cells . Deficiency happens ...

Anatomy of the Knee: Structure, Function, and Key Components The knee is one of the most important joints in the human body. It not only allows us to walk, run, and jump but also supports the body’s weight during daily activities such as standing and sitting. Due to its complex design, the knee is often described as both strong and vulnerable—capable of carrying heavy loads yet prone to injury. Understanding the anatomy of the knee helps explain how it functions and why it is essential for mobility. Major Bones of the Knee The knee joint connects the femur (thighbone) to the tibia (shinbone). The patella (kneecap) sits in front of the joint, protecting it and improving the leverage of the thigh muscles during movement. The fibula , a smaller bone beside the tibia, provides additional support and serves as an attachment point for ligaments. Cartilage Two types of cartilage play a key role in the knee. Articular cartilage covers the ends of the femur and tibia, allowing smooth...

Anatomy of Ear: Internal and Physical Features The human ear is a remarkable sensory organ responsible for hearing and balance. Its structure is divided into three main regions: the outer ear, middle ear, and inner ear. Among these, the inner ear plays a vital role, containing highly specialized parts such as the cochlea, vestibule, semicircular canals, and auditory nerve . Each of these structures has unique physical features and functions that work together to transmit sound and maintain equilibrium. The Cochlea The cochlea is a spiral-shaped, snail-like structure located in the inner ear. It consists of three fluid-filled chambers: the scala vestibuli, scala media, and scala tympani. Inside, it houses the organ of Corti , which contains sensory hair cells. These hair cells convert sound vibrations into electrical impulses. The spiral shape of the cochlea allows for the separation of sound frequencies, enabling humans to distinguish between low and high-pitched sounds. Functions...