Over a million students use our free study notes to help them with their homework
Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration through a partially/selectively perme...
The process by which our bodies maintain a constant internal environment is homeostasis. This includes things such as body temperature, blood glucose levels and pH levels. This is important because there ...
Phylogeny is the study of the evolutionary relationships of organisms. A good acronym to learn this is King Plays Cards on Fat Girls Stomach.K - Kingdomp - PhylumC - ClassO - OrderF - Family G - Genus S -...
The cardiac cycle is what happens during a single heartbeat.
To understand the cycle it helps to know that the heart is made up of four chambers, the top 2 chambers are called the atria a...
Sometimes microorganisms are able to make it past the body's external defences (i.e. the skin) the body's immune system must defend the body.
White blood cells are really important in the...
←
353
354
355
356
357
→
Internet Safety
Payment Security
Cyber
Essentials
Comprehensive K-12 personalized learning
Immersive learning for 25 languages
Trusted tutors for 300 subjects
35,000 worksheets, games, and lesson plans
Adaptive learning for English vocabulary
Fast and accurate language certification
Essential reference for synonyms and antonyms
Comprehensive resource for word definitions and usage
Spanish-English dictionary, translator, and learning resources
French-English dictionary, translator, and learning
Diccionario ingles-espanol, traductor y sitio de apremdizaje
Fun educational games for kids