All over
Plant cells have these but animal cells do not.
The movement of particles from an area of high concentration to low concentration.
Diffusion
These are the smallest units of life.
Cell
This system is primarily responsible for removing waste from the body.
Excretory System
The main function of the immune system.
To fight infections and diseases
He is credited with inventing the microscope.
Robert Hooke
Water molecules moving across a semipermeable membrane from high to low concentration.
Osmosis
Organisms made of many cells.
Multicellular
The major organ of the circulatory system.
Heart
Two examples of primary line of defense.
Skin, mucus, tears (any two)
All living things are made of cells and all cells come from pre-existing cells.
The cell theory
This tool uses light and lenses to view tiny organisms.
Light Microscope
These unicellular organisms do not contain a nucleus.
Prokaryotes
Keeping the body’s internal environment stable and balanced.
Homeostasis
The secondary line of defense involves these cells attacking pathogens.
White Blood Cells
The four types of tissue found in the human body.
Epithelial, connective, muscle, nerve
The internal structures inside a cell.
Organelles
These complex cells contain a nucleus and membrane-bound organelles.
Eukaryotes
Vaping negatively affects this body system.
Respiratory system
Fever and inflammation belong to this level of the immune response.
Secondary Line of defense
This type of blood vessel usually carries oxygen-rich blood.
Arteries
Raw, undifferentiated cells that can become other cell types.
Stem cells
The seven characteristics shared by all living things.
Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition
Drinking energy drinks often can affect this body system.
Circulatory system
This is why a person with a weakened immune system might get sick more often, even if their skin, mucus, and other primary defenses are working normally.
their secondary line of defense (white blood cells and inflammatory response) cannot effectively destroy pathogens