10 results for “cell”
The Human Body
The Immune System
cells. T cells are the commanders and assassins. Some coordinate the response, telling B cells to multiply
Article · 4 min read
The Human Body
The Heart and Blood
cells pass through in single file, with walls one cell thick. It is here, across those
Article · 4 min read
The Human Body
Skin, Hair and Nails
cells beneath from damage. Everyone has about the same number of pigment cells; people with darker
Article · 3 min read
The Human Body
Lungs and Breathing
cells burn for energy and carries away the carbon dioxide that burning produces. The journey of a breath
Article · 4 min read
The Human Body
The Senses
cells. There are two kinds. About 120 million rods work in dim light and see only
Article · 4 min read
The Human Body
The Skeleton and Bones
cells a day: red blood cells to carry oxygen, white blood cells to fight infection, platelets
Article · 5 min read
The Human Body
Muscles
cells, about once a second, for a lifetime, without ever resting or tiring. It combines the strength
Article · 4 min read
The Human Body
The Brain
Cells that talk The brain is built from about 86 billion nerve cells, neurons, supported by a similar
Article · 4 min read
The Human Body
Digestion
cell membrane, every molecule of energy you burn came in through this tube. Its health shapes
Article · 4 min read
The Human Body
Sleep and Dreams
cells that acts as a master clock. It runs on a cycle of about 24 hours
Article · 3 min read
