Science-bio Flashcards
What happens in gas exchange?
oxygen moves from lungs to bloodstream and carbon dioxide passes from the blood to the lungs
What do we take in and give out?
take in oxygen and give out carbon dioxide
Where does it happen?
in the lungs
Lungs are made of…
elastic tissue that can expand
What is the lungs protected by?
hard bones that make your ribcage
What happens when you breathe in?
-air goes through nose
-moves down the trachea
-moves down the bronchus
-moves through a bronchiole
-moves into an alveolus
-oxygen diffuses into blood
What is oxygen used for?
To transfer energy
What does respiration produce?
carbon dioxide whic h is removed from the body
What is the alveoli?
Tiny air sacs at the end of the bronchioles.It also has thin walls
What is a bone?
a living tissue with a blood supply
Bones are always ________ and _______
Growing and changing
What makes Bones strong?
lots of calcuim
What is important for bones?
exercise and a balanced diet
What are multicellular organisms made of?
Made of many cells
Unicellular organisms are made of how many cells?
only one.uni=one
What level is tissue?what are tissues?
2nd level,group of cells tha do a certain function
What level is multicellular organism?what are they?
5th and last level,made of organ systems to perform all processes
What are organs systems?
group of organs that perform a certain function
What happens when you inhale?
1.diaphram contracts
2.pressure in chest
3.volume increases in chest
What happens when you exhale?
1.diaphram relaxes
2.pressure in chest
3.volume decreases in chest
Joints?
Where 2+ bones join together
Types of joints
hinge,ball & socket,fixed joints
Ligament?
Bind bone to bone
What is a muscle?
type of tissue that work to cause movement
