Cells & Organelles
The basic unit of life.
Cells
Cells that do not have a nucleus belong to this group.
Prokaryote
Oxygen enters the blood in this respiratory structure.
Alveoli
This organ pumps blood around the body.
Heart
The gas needed by cells for respiration.
Oxygen
The organelle that controls the activities of the cell.
Nucleus
Helpful bacteria that normally live in and on our bodies are called this.
Flora
Nutrients absorbed in the small intestine enter this body system.
Circulatory System
These organs exchange oxygen and carbon dioxide with the blood.
Lungs
Blood vessels that carry blood away from the heart.
Arteries
The organelle known as the "powerhouse of the cell."
Mitochondria
Disease-causing microorganisms are known as these.
Pathogens
The kidneys remove this toxic waste from the blood.
Urea
This crushes food and begins digestion.
Mouth
The waste gas removed by the respiratory system.
Carbon dioxide
This organelle contains chlorophyll and is found only in plant cells.
Chloroplast
The process bacteria use to reproduce by splitting into two identical cells.
Binary Fission
During exercise, these two body systems work together to supply muscles with more oxygen.
Respiratory and circulatory systems
What part of the heart sends blood to the rest of the body?
Aorta
A plant cell has these two structures that an animal cell does not.
Cell wall and chloroplasts
This structure controls what enters and leaves the cell.
Cell membrane
What type of cell is a virus?
Trick question, as a virus is not a cell (they are not alive)
Explain the pathway oxygen takes from the air to a bloodstream
Mouth/Nose --> pharynx --> larynx --> trachea --> bronchi --> bronchioles --> alveoli
These tiny structures in the kidneys play a key role in filtration and reabsorption
Nephrons
Put these kidney processes in order: Excretion, Filtration, Secretion, Reabsorption
Filtration → Reabsorption → Secretion → Excretion