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Life Science articles — Page 87

Read about living things, from cells and plants to animals and the human body. Choose an article below; its reading controls let you move between the available levels.

5,533 public articles · Page 87 of 116

Explore related Science Lab activities about plants, animals and ecosystems or the human body, each at five reading levels.

Orthomyxoviridae

Some tiny germs cause the flu. They live in birds and people. These germs can make us feel sick. They spread through the air when we cough. We must wash our hands to stay well. Do you like to stay healthy?

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Orthonectida

Tiny worms live in the sea. They are very small. They live inside other sea animals. These tiny worms swim around. It is a strange way to live. Can you find them in the ocean?

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Orthopedic boot

A boot helps a hurt foot. It stays on your leg. It keeps your foot still. This helps it get well. You can take it off to wash. It is a big help! Do you have a hurt foot?

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Orthopedic cast

A cast helps your bones heal. It keeps your arm or leg still. This helps the break get better. It can be hard and strong. You might use crutches to walk. Do you know what a cast feels like?

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Orthopedic surgery

Doctors help fix your bones. They help if you get hurt. They can fix a broken leg. They help you move well. This helps you play and run. Do you like to run?

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Orthotics

Braces help our bodies move. They can go on legs or arms. Some help us stand up tall. They help us walk well. These tools help many people. Do you want to see more?

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Oryx

The oryx is a large animal. It lives in the dry desert. They have very long horns. These animals can go a long time without water. They are very strong. Can you see their long horns?

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Oryza

Rice is a tall grass. It grows in wet land. We eat it for food. It helps many people stay full. It is very good. Do you like to eat rice?

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Oryza glaberrima

African rice is a special plant. It grows in West Africa. It has a yummy nutty taste. This rice is very strong. It can grow in many places. It helps people have food. Do you like rice?

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Osmoregulation

Living things need the right amount of water. This helps them stay healthy. Some fish live in salt water. Others live in fresh water. Their bodies work hard to keep the balance. It is like a tiny sink that stays…

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Ossicles

You have tiny bones in your ear. They help you hear sounds. These bones move when sound hits them. They make the sound stronger. This helps your brain hear well. It is a neat trick! Can you hear a bird sing?

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Osteoarthritis

Our joints can get sore. This can happen to your hands or knees. It might feel stiff. Moving can be hard. It helps to rest and move your body. Does your body feel good today?

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Osteoglossiformes

Some fish have hard tongues. They live in fresh water. You can find them in many lands. They can be very big. Some are even as big as a man! Do you like fish?

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Osteolepis

This fish lived long ago. It had big, square scales. It lived in a lake. It ate small things in the water. We can find its bones today. Do you like fish?

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Osteoporosis

Our bones stay strong. They can get weak as we grow old. Weak bones might break more easily. This can happen if we fall. Eating good food helps our bones. Do you eat healthy food?

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Ostraciidae

Some fish look like little boxes. They have hard skin. This skin is like a shell. It keeps them safe. They can be many colors. Do you like bright colors?

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Ostrich

Ostriches are very big birds. They can run very fast. They do not fly in the sky. These birds live in Africa. They lay very large eggs. You might see them run! Do you like big birds?

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Othniel Charles Marsh

Marsh loved old bones. He looked for them in the ground. He found many new kinds of dinosaurs. These bones help us learn about the past. He was a great teacher. Do you like to look for fossils?

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Otitis externa

Your ear can get sore. It might feel itchy. It might feel red. This can happen after swimming. It can happen if you scratch inside. It can feel bad to touch. Does your ear ever itch?

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Otitis media

Sometimes your ears can hurt. This can happen inside your ear. It might feel full. You might have a fever too. It can make it hard to hear. We can help your ears feel better. Do your ears ever feel funny?

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Otto Heinrich Warburg

Otto Warburg was a great doctor. He studied how our bodies work. He found out how cells use air. This helped him learn about sickness. He won a big prize for his work. Do you like to learn new things?

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Ottoia

This was a small worm. It lived in the sea. It moved through the mud. It used its mouth to find food. It was a hunter. Can you find it in the picture?

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Otto Rank

Otto Rank was a smart man. He studied how people think. He helped many people feel better. His ideas help us today. He loved art and stories too. Can you think of a story?

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Outer ear

Your ear is on the outside. It catches sounds for you. It has a small tube inside. This tube helps you hear well. It helps you hear people talk. It is a very cool part of you. Do you like to listen?

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Ovarian cancer

Some women get a sickness called cancer. It can grow in a small part of the body. It may make the belly feel full. Doctors can help fix it. We want everyone to stay healthy. Do you know how to stay well?

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Overexploitation

People take too much from nature. This can happen to fish. It can happen to trees too. We must be careful. If we take too much, it might go away. We want to keep nature safe. Do you like to help nature?

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Overfishing

People catch too many fish. They take fish from the sea. There are not enough left to make babies. This is bad for the ocean. We need to help the fish. Do you like fish?

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Overweight

Our bodies need fat to work. It keeps us warm. It also helps us move. Sometimes we have too much fat. This can make moving hard. We can eat well and play to stay healthy. Do you like to run and play?

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Oviraptor

Oviraptor was a dinosaur. It lived in Asia. It had soft feathers. It sat on its eggs to keep them safe. It was a good parent. Do you like dinosaurs?

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Ox

An ox is a big animal. It can pull very heavy things. It helps people farm the land. It can pull carts too. These animals are very strong. Do you like big animals?

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Oxidative phosphorylation

Your body makes energy. It uses food to do this. It also needs air. This helps you run and play. It is like a tiny motor. Do you feel busy today?

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Oxpecker

The oxpecker is a small bird. It lives in Africa. It sits on big animals like zebras. The bird eats tiny bugs off their skin. This helps the big animals. Do you like birds?

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Oxyaenidae

Long ago, some animals lived on Earth. They looked like badgers or otters. These animals ate meat. Some even lived in trees. They had big claws to help them hunt. We can find their bones today. Do you like old bones?

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Oystercatcher

These birds live by the sea. They have long, bright bills. They use them to open shells. They eat yummy food from the water. We can see them on the beach. Do you like the beach?

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Pacemaker

A small tool helps your heart. It stays inside your body. It sends tiny pulses to your heart. This helps your heart pump blood. It keeps your heart beat steady. This helps you stay well. Do you want to learn more?

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Pachycephalosauria

Some dinosaurs had very thick heads. They lived a long time ago. They walked on two legs. They ate plants from the ground. These dinosaurs were not very big. Do you like dinosaurs?

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Pachycephalosaurus

This dinosaur had a very thick head. It had a big bone dome. This dome helped protect its brain. It used its strong legs to walk. It ate plants for food. Do you think it was big?

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Pachypasa

Some moths are in a big group. They live in many far places. Some live in Africa. Others live in places like Greece. We can find them in the wild. They are very neat to see. Have you seen a moth?

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Pachyrhinosaurus

This was a big dinosaur. It lived a long time ago. It had thick bumps on its nose. It ate plants to grow. These dinosaurs lived in groups. Do you like big dinosaurs?

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Pacific bluefin tuna

The bluefin tuna is a big fish. It lives in the big ocean. This fish can swim very fast. It can stay warm in cold water. This helps it find food. Do you like to see fish?

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Pacific saury

The saury is a long fish. It lives in the big ocean. It has blue spots on its side. People eat this fish for dinner. It can be grilled with rice. Do you like fish?

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Pacific temperate rainforests

Big green forests grow by the sea. It rains a lot there. Tall trees grow very high. Many animals live in the trees. Bears and birds like it too. It is a busy place. Do you like the rain?

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Paddlefish

Paddlefish are special fish. They have long noses. These noses help them find food in dark water. This fish lives in big rivers. It is very cool to see! Do you like fish?

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Pademelon

The pademelon is a small animal. It looks like a tiny kangaroo. It lives in thick woods and grass. The mother carries her baby in a pouch. We can see them in Australia. Do you like small animals?

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Palaemon serratus

This is a small shrimp. It lives in the deep sea. It is pink and brown. Many fish like to eat it. It can hear sounds in the water. Can you hear the sea? We can look for them too.

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Palaeomerycidae

Long ago, some large animals lived. They had horns on their heads. These animals lived in far lands. They were very big and strong. We can see their bones today. Do you like old animals?

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Palaeotheriidae

These animals lived a long time ago. They lived in Europe and Asia. They ate plants for food. Some were small. Some were big like a horse. They are gone now. Do you like old bones?

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Palaeotherium

An old beast lived long ago. It looked a bit like a horse. Some were big and some were small. They lived in a place called Europe. They ate leaves and fruit. Can you find the big one?

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