Characteristics of Living Things
What are all living things made of?
What is the basic unit of life?
The Cell
Which system breaks down food and nutrients?
Digestive
Which organ breaks down food in the digestive system?
Stomach
Which tool helps us see tiny structures, like cells?
Microscope
Energy
Structures inside a cell that perform specific tasks are called _________
Organelles
Which system allows us to breathe in oxygen and remove carbon dioxide?
When we exercise, the ________ system helps deliver more oxygen to muscles, and the _____ system helps remove waste from the body.
Circulatory and Excretory
Reproduce
Cells can be either ___________ or ______________
single-celled (unicellular) or multi-celled (multicellular)
Which system sends messages throughout the body to control functions?
Nervous
Which organ controls thoughts and actions?
Brain
Which two systems work together to help us move?
Nervous and Muscular
Living things respond to their _________
The process of substances moving in and out of cells is called _________ and ____________
diffusion and osmosis
Which system transports oxygen and nutrients throughout the body?
Circulatory
Which organ is responsible for gas exchange in the respiratory system?
Lungs
Which two systems work together to deliver oxygen to cells?
Respiratory and Circulatory
What is it called when organs together to perform a common function?
Organ System
List the hierarchy of life/levels of organization starting at the smallest
Cells
Tissues
Organs
Organ Systems
Organism
Which system removes waste products from the body?
Excretory
Which organ filters and removes waste from the blood?
Kidneys
Which two systems work together to deliver nutrients to cells?
Circulatory and Digestive