7 results for “heart muscle”
The Human Body
Muscles
muscle, and its cells are linked so that a contraction sweeps through the whole heart as one. How a muscle
Article · 4 min read
The Human Body
The Heart and Blood
heart is a muscle the size of your fist whose only job is to keep the blood
Article · 4 min read
Animals
Sharks
muscles move or its heart beats. A shark can find a flatfish buried in sand by its heartbeat
Article · 3 min read
The Human Body
The Skeleton and Bones
muscles move you, shield your brain, heart and lungs, make your blood and bank your minerals
Article · 5 min read
Animals
Mammals
heart the size of a small car and a tongue heavier than an elephant. Bats, a fifth of all mammal species, are the only mammals that fly, using wings of skin stretched
Article · 4 min read
Animals
The Octopus
hearts, blue blood, eight arms that think for themselves and a brain that evolved entirely separately from ours. The octopus is the closest thing to an alien mind on Earth. The last
Article · 3 min read
The Human Body
Sleep and Dreams
heart rate fall, and it is hard to wake up. Most deep sleep happens in the first half of the night. Each cycle ends with REM sleep, named after the rapid
Article · 3 min read
