7 results for “red blood cell”
The Human Body
The Heart and Blood
red blood cells pass through in single file, with walls one cell thick. It is here
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
Lungs and Breathing
red blood cells, but above about 8,000 metres it cannot keep up, which is why most
Article · 4 min read
The Human Body
The Brain
cells. A neuron has a body, a tree of branching fibres called dendrites that receive signals, and a single long cable, the axon, that carries its own signal onward, sometimes
Article · 4 min read
The Human Body
The Immune System
blood vessels leak, flooding the area with fluid and white cells, which is why a wound goes red
Article · 4 min read
The Human Body
Muscles
cells called fibres, some running the full length of the muscle. Inside each fibre are thousands of parallel threads, and inside each thread, repeated end to end, is the working unit
Article · 4 min read
The Human Body
The Senses
red, green and blue. Every colour you see is a mixture of three signals, which is why screens need only three colours of pixel. The retina does some processing itself, detecting edges
Article · 4 min read
