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Cells

Cells and Body Syste

QuestionAnswer
Multicellular Made of many cells. (Example: humans, plants)
Unicellular Made of only one cell. (Example: bacteria)
Tissue A group of similar cells that work together to do one job.
Organ A structure made of different tissues that work together. (Example: heart)
Organ System A group of organs that work together to perform a major function. (Example: digestive system)
Organism A living thing.
Organism Hierarchy The levels of organization in living things: cell → tissue → organ → organ system → organism
Bacteria Tiny unicellular organisms that do not have a nucleus.
Colonies Groups of unicellular organisms living close together.
Yeast A unicellular fungus used in baking and science labs.
Prokaryote A cell that does NOT have a nucleus. (Example: bacteria)
Eukaryote A cell that HAS a nucleus. (Example: plant and animal cells)
Magnify To make something look bigger.
Microscope A tool that magnifies objects too small to see with your eyes.
DNA The instructions inside a cell that tell it how to grow and function.
Nucleus The control center of the cell that holds DNA.
Cell Wall A stiff outer layer that supports and protects plant cells.
Cell Membrane A thin layer that controls what goes in and out of the cell.
Algae Simple plant-like organisms that live in water and make their own food.
Chloroplast(s) Organelles in plant cells where photosynthesis happens.
Chromosomes Structures made of DNA that carry genetic information.
Life-Sustaining Functions Processes that keep an organism alive, like breathing and circulation.
Muscular System The system that allows movement and helps pump blood.
Skeletal System The system of bones that supports and protects the body.
Circulatory System The system that moves blood, oxygen, and nutrients through the body.
Digestive System The system that breaks down food into nutrients.
Respiratory System The system that helps you breathe and get oxygen.
Anatomy The study of body structures.
Bone A hard structure that supports and protects the body.
Bone Marrow Soft tissue inside bones that makes blood cells.
Muscle Tissue that contracts to cause movement.
Muscle Cell A cell specialized for movement.
Connective Tissue Tissue that supports and connects body parts.
Heart A muscular organ that pumps blood.
Heart Rate How fast the heart beats.
Aorta The largest artery that carries blood away from the heart.
Artery A blood vessel that carries blood away from the heart.
Nervous System The system that controls responses and sends messages in the body.
Brain The control center that processes information.
Brain Stem Controls basic life functions like breathing.
Cerebellum Controls balance and coordination.
Cerebrum Controls thinking, memory, and decision-making.
Nerve A bundle of cells that sends signals through the body.
Transmit To send information.
Stimulus A change in the environment that causes a response.
Response How an organism reacts to a stimulus.
Internal Cue A signal from inside the body (like hunger).
Receptor A cell that detects a stimulus.
Sense Receptor A specialized receptor for sight, sound, touch, taste, or smell.
Reflex A fast, automatic response to a stimulus.
Automatic Happens without thinking.
Sensory Related to the senses.
Behavioral Response to Stimuli An action an organism takes after sensing a stimulus.
Memory The ability to store and recall information.
Perception How the brain understands sensory information.
Accuracy How correct something is.
Immediate Happening right away.
Short-Term Memory Memory that lasts a short time.
Long-Term Memory Memory stored for a long time.
Taste The sense that detects flavors.
Smell The sense that detects odors.
Touch The sense that detects pressure, pain, and temperature.
Hear The sense of sound.
Sight The sense of seeing.
Salt, Sour, Sweet, Bitter Types of tastes detected by taste receptors.
Electromagnetic A type of energy that includes visible light.
Vertebrate An animal with a backbone.
Invertebrate An animal without a backbone.
Reproduction The process of making new organisms.
Breed To reproduce.
Created by: user-2008546
 

 



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