Body Systems and Cells 2025

Nervous System

Control of body activities and the

reaction to stimuli; send electrical

messages

Circulatory System

Transport of nutrients, metabolic

wastes, water, salts, and disease

fighting cells

Respiratory System

Intake of oxygen and removal of

carbon dioxide from body, exchanges gases in the lungs

Digestive System

Break down of food and absorption

for use as energy

Urinary System

Removal of waste; controls water

and salt balance: bladder, kidneys

Endocrine System

Production of hormones and body

regulation: glands

Muscular System

movement/locomotion: muscles

Skeletal System

protects internal organs and supports the body : bones

Integumentary System

Protection of body from injury and

bacteria, maintenance of tissue

moisture, holds receptors for stimuli

response, body heat regulation skin, hair, nails

Reproduction

creating offspring

Unicellular

organisms with one cell.

Multicellular

organisms with more than one cell.

Autotrophic

organisms that are able to create their own food from sunlight; PLANTS.

Heterotrophic

organisms that are not able to create their own food; ANIMALS/HUMANS.

Cell membrane

Allows substances in and out of the

cell (Like a classroom door)

Cell Wall

Protect and Support for Plants

Nucleus

Control center; DNA (Like the school

principal)

Ribosomes

Proteins are found in this location

Cytoplasm

Fluid that surrounds the organelles

Mitochondria

"Power House"

Makes energy for the cell

Chloroplast

Site where photosynthesis occurs in plant cells

Vacuole

Storage for substances like water

and nutrients" (like your pantry)