12 results for “heart”
The Human Body
The Heart and Blood
heart sets itself. The pipes Blood leaves the heart through arteries, thick-walled tubes with muscular
Article · 4 min read
The Human Body
Muscles
heart. It contracts on its own rhythm, set by a cluster of pacemaker cells, about once
Article · 4 min read
Animals
The Octopus
hearts, blue blood, eight arms that think for themselves and a brain that evolved entirely separately
Article · 3 min read
The Human Body
The Skeleton and Bones
heart and lungs and expands with each breath. The pelvis is a bowl of fused bones
Article · 5 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
Article · 3 min read
Animals
Reptiles and Amphibians
heart stopped and its blood turned to ice, protected by sugar pumped into its cells, and thaws
Article · 3 min read
Space & the Universe
Black Holes
heart of galaxy M87, 55 million light-years away. Three years later the same team imaged
Article · 3 min read
Animals
Mammals
heart the size of a small car and a tongue heavier than an elephant. Bats, a fifth
Article · 4 min read
The Human Body
The Brain
heart rate and sleep, and connects everything to the spinal cord. Memory A memory is not stored
Article · 4 min read
Space & the Universe
Galaxies and the Milky Way
heart of the Virgo cluster, M87, probably holds several trillion. The neighbourhood Galaxies are social. The Milky
Article · 4 min read
Space & the Universe
Nebulae
heart. That cloud is the Orion Nebula, and it is one of the most beautiful objects
Article · 3 min read
Animals
Sharks
heart beats. A shark can find a flatfish buried in sand by its heartbeat alone. The hammerhead
Article · 3 min read
