Structure and function of body systems Flashcards
What are Multicellular organisms made up of?
Many cells.
What is levels of organisation also known as?
A hierachy.
What is a tissue?
A group of similar cells that work together to perform a certain function.
What is an Organ?
A group of different tissues that work together to perform a certain function.
What does a liver do?
Removes toxins (poisons)from the blood and produces bile to help digestion.
What does a kidney do?
Filters the blood and produces urine.
What is an organ system?
A group of different organs that work together to perform a certain function.
What does the gas exchange system do?
I takes in oxygen from the body.
What are reproductive systems?
Organ systems that make new organisms.
What is a multicellular organism?
It is made up of several organ systems working together to perform all the processes that are needed to keep the organs alive.
Where are joints?
Where two or more bones join together.
What are hinge joints for?
They are for movements backwards and forwards.
What is an example of a hinge joints?
Knee and elbow.
What are ball and socket joints?
They are for movements in all directions.
What are examples of ball and socket joints?
Hip and shoulder.
What are fixed joints?
They do not allow any movement.
What are examples of fixed joint?
Skull.
What is a pivot joints?
They allow movement around a point and it allows you to rotate your head from side to side.
What do ligaments do?
They hold two bones together?
What is a cartilige?
The ends of a bone in a joint.
What are muscles?
They are a type of tissue-lots of muscle cells do not work together to cause movement.
How do muscles work?
To make you move,your muscles work by getting shorter-they contract.
How are muscles attached to bones?
They are attched by tendoms.
What happens when a muscle contracts?
When a muscle contracts it pulls on a bone. If the bone is part of a joint, the bone will bone.
What are antagonistic muscles?
A pair of muscles that work together to control movement at a joint-as one muscle contracts, the other muscle relaxes
