HS-LS1-2
Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.
- Space
Space travel may harm health by damaging cells’ powerhouses
Biochemical changes after going to space suggest that harm to cells’ energy-producing structures, called mitochondria, could explain astronauts’ health issues.
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Scientists Say: Respiration
Breathe in and out, that’s respiration. Have a cell break down sugars for energy, and that’s respiration too.
- Brain
A taste map in the brain is a scattering of tiny flavor islands
Some senses are highly organized in the brain. Taste is not. And that points to just how important it is.
- Animals
Touching allows octopuses to pre-taste their food
Special sensory cells in their arms’ suckers sense chemicals. Those cells allow them to taste the difference between food and poison.
- Health & Medicine
Strongest bones come from Goldilocks recipe of exercise and rest
Building strong bones for life depends on adolescents staying active and getting enough sleep. Sometimes a lot of sleep, like 11 hours!
- Life
Ogre-faced spiders listen closely to snatch bugs from the air
Ogre-faced spiders can hear prey sneaking around behind them. Low frequencies can trigger a blind, backwards attack.
- Plants
Please do not touch the Australian stinging tree
Stinging-tree leaves look soft and inviting, but one touch delivers agony. Structurally, the plant's painful chemical looks a lot like spider venom.
- Animals
The diabolical ironclad beetle is nearly unsquishable
The diabolical ironclad beetle is an incredibly tough little creature. A peek inside its exoskeleton reveals what makes it virtually uncrushable.
- Health & Medicine
Teen athletes with even mild COVID-19 can develop heart problems
COVID-positive student athletes, some with no symptoms, have developed heart inflammation and more. They are new reasons to limit coronavirus exposure.
- Brain
Kids use more of the brain than adults do to process language
The brain continues to grow and mature throughout childhood. One big change occurs in which parts of the brain turn on as someone processes language.
- Health & Medicine
When physicians and veterinarians team up, all species benefit
When doctors for people and those for animals share their expertise, they can discover new ways to take better medical care of all species.
- Health & Medicine
Let’s learn about bones
Bones hold us up and help us fight gravity with every step. They also make blood cells, hormones and more.
