Vocabulary
What is the smallest unit that is said to be alive?
cell
mitochondria
What does the mitochondria use to power the cell?
sugar
What system brings oxygen into the body and gets rid of the carbon dioxide?
respiratory system
What are he special cells in the skin that detect different kinds of stimulus?
sensory receptors
___ are specialized structures inside cells that perform important functions?
organelles
What are the structures that transport materials throughout the body called?
blood vessels
Why do cells need to divide?
they need to grow, repair and reproduce
What system involved pumping blood throughout the body?
circulatory system
what is a change that causes a reaction?
stimulus
What do we call an organism made up of more than on or many cells?
multicellular
what structures provide the body with structure and support
bones
How does handwashing and antibiotic ointment affect bacteria growth?
it reduces the amount of bacteria growing
what are the special cells that send the information from the sensory receptors to the brain?
nerve cells
what is the the boundary around a cell that controls what goes in and out called?
cell membrane
what is the structure only found in plant cells that is a rigid boundary used for protection?
cell wall
Cells come in many different ____ and _____
shapes and sizes
Where does oxygen start and end in the gas exchange system?
starts in the lungs, ends in the blood
what is information stored in the brain?
memories
what organelle controls or directs cell activity?
nucleus
what are the air sacs in the lungs called?
alveoli
What is the purpose of skin?
to act as protection by acting as a barrier
where does carbon dioxide start and end in the gas exchange system?
starts in the blood, ends in the lungs
what is the order of organization from smallest to largest for the following terms?
organ, tissue, cell, organ system,
cell, tissue, organ, organ system