Human Biology – Page 2

How the Human Immune System Works

The immune system is the body’s natural defense network that protects against harmful pathogens such as bacteria, viruses, fungi, and parasites. It is not a single organ but a complex…

deka September 18, 2025

Human Biology Public Health

Infection: What It Is and How It Affects the Body

An infection occurs when harmful microorganisms such as bacteria, viruses, fungi, or parasites enter the body and begin to multiply. These organisms may spread through direct contact, contaminated food and…

deka September 18, 2025

Human Biology Smart & Healthy

Microbes: The Invisible World That Shapes Life

Microbes are microscopic organisms that are too small to be seen with the naked eye. They include bacteria, viruses, fungi, protozoa, and some algae. Despite their size, microbes play a…

deka September 16, 2025

Human Biology Smart & Healthy

Leukocytes

Leukocytes, also known as white blood cells (WBCs), are a crucial part of the human immune system. Unlike red blood cells, which carry oxygen, leukocytes defend the body against infections,…

deka September 12, 2025

Human Biology Smart & Healthy

Platelets

Platelets, also known as thrombocytes, are small, disk-shaped cell fragments in the blood that play a key role in blood clotting and wound healing. Although they are not full cells…

deka September 12, 2025

Human Biology Smart & Healthy

How Blood Is Structured and Why It Is Important

Blood is one of the most vital fluids in the human body, making up about 7–8% of body weight. It flows through an intricate network of blood vessels, delivering oxygen…

deka September 12, 2025

Human Biology Smart & Healthy

How Human Blood Vessels Are Structured and Why They Are Important

The circulatory system is one of the body’s most vital networks, ensuring that every organ and cell receives oxygen, nutrients, and protection. At the core of this system are the…

deka September 12, 2025

Human Biology Smart & Healthy

Why Women’s Breasts Are Larger Than Men’s

The difference in breast size between women and men is one of the most distinct physical traits of human biology. While both sexes are born with breast tissue and mammary…

deka September 10, 2025

Fuel Your Body Healthy Lifestyle Human Biology

The Stomach’s Capacity and What Happens When It Stretches from Overeating

The stomach is a muscular organ located in the upper abdomen that plays a key role in digestion. Its size is flexible, allowing it to expand and contract depending on…

deka September 3, 2025

Human Biology Public Health Smart & Healthy

How Vitamin B12 Deficiency Affects the Body

Vitamin B12 (cobalamin) is an essential nutrient that plays a key role in blood formation, nerve function, and DNA synthesis. Since the body cannot produce it on its own, vitamin…

deka September 3, 2025