All 23 Human Body Systems flashcards. Free.
The whole deck, not a sample — Human Body Systems is 23 cards, which is no longer than the 30 we give away on every deck, so there is nothing left to charge for. 11 pages, US Letter, black and white. Grades 6–12 / health science CTE.
No account, no email, no card details.
11 pages, and the backs are already right
Every front sheet is followed by its own back sheet with the rows reversed. Print double-sided, flip on the long edge, and answer number 7 is behind question number 7. Print a deck you built yourself, flip on the short edge, and every answer lands on the wrong card — which nobody finds out until sixty cards have been cut apart.
- 23 cards — counted out of the file, not rounded up
- Eight cards a sheet, with cut guides
- US Letter PDF, black and white, photocopier-friendly
- Print a set per student, every class, every year
23 cards — the eleven organ systems, asked twice each (organs, then job), plus one card on why some books count ten or twelve. Individual bones and muscles are not repeated here; they have their own decks.
Every card here is cited to two independent sources
Two different organisations — not a standards body and a website reprinting it — and a script refuses the card if the two disagree, so the check runs on every card rather than on the ones somebody remembered to look at. A second specialist then re-verified this deck from sources of their own, without reading our citations first. A further 5,420 cards across 30 other decks were read end to end by a subject specialist instead, and we say which is which on every deck rather than averaging the two into one flattering word.
What 23 printed cards do that a screen does not
A phone deck is one card at a time. A printed deck is a pile you can split: the ones you know, the ones you nearly know, and the ones you keep missing. That third pile is the entire study session, and it is the thing a scrolling app hides from you.
- Print once, use all year. The licence covers a set per student, every class, every year.
- No device, no login, no data. Works in a cover lesson, on a bus, or at a kitchen table. Grades 6–12 / health science CTE, filed under science.
- Change what you disagree with. Every card loads into the free maker on this site. Reword it, drop it, add your own, reprint.
Here are all 23 cards
Check them against your own textbook before you spend anything.
- Integumentary system — main organs
- Skin (epidermis, dermis, subcutaneous layer) with hair, nails, sweat and sebaceous glands
- Integumentary system — what it does
- Barrier against microbes, water loss and UV; carries sensation, sheds heat, starts vitamin D
- Skeletal system — main organs
- Bones, cartilage, ligaments and the joints between them
- Skeletal system — what it does
- Supports and shapes the body, shields soft organs, gives muscles levers, stores calcium
- Muscular system — main organs
- Skeletal muscle and its tendons; smooth and cardiac are the body's other two muscle types
- Muscular system — what it does
- Contracts to move the body, holds posture, steadies joints and produces heat
- Nervous system — main organs
- Brain, spinal cord, nerves and ganglia, fed by sensory receptors
- Nervous system — what it does
- Senses change, integrates it, drives the response — fast electrical control and communication
- Endocrine system — main organs
- Pituitary, pineal, thyroid, parathyroids, adrenals, pancreatic islets and the gonads
- Endocrine system — what it does
- Releases hormones into the blood — slower, longer and more widespread control than nerves
- Cardiovascular system — main organs
- Heart, arteries, veins and capillaries, and the blood they carry
- Cardiovascular system — what it does
- Pumps blood round a closed circuit, delivering oxygen and nutrients and carrying waste and heat
- Lymphatic system — main organs
- Lymph and lymphatic vessels, lymph nodes, tonsils, thymus and spleen
- Lymphatic system — what it does
- Returns excess tissue fluid to the blood, absorbs dietary fat, and mounts immune defence
- Respiratory system — main organs
- Nose, pharynx, larynx, trachea, bronchial tree and lungs
- Respiratory system — what it does
- Ventilates the lungs and swaps oxygen for carbon dioxide with the blood; helps set blood pH
- Digestive system — main organs
- Mouth, pharynx, esophagus, stomach, small and large intestine, plus liver, gallbladder, pancreas
- Digestive system — what it does
- Breaks food down to molecules small enough to absorb, absorbs them, eliminates the residue
- Urinary system — main organs
- Kidneys, ureters, urinary bladder and urethra
- Urinary system — what it does
- Makes urine — holding fluid volume, electrolytes and pH steady while clearing metabolic waste
- Reproductive system — main organs
- The gonads — ovaries or testes — with their ducts, accessory glands and external genitalia
- Reproductive system — what it does
- Makes gametes and sex hormones, transports and sustains them, nurtures developing offspring
- How many organ systems does the body have?
- Eleven, on the convention used here; counts differ — SEER lists ten, other texts split immune from lymphatic
Questions
- How do I print them double-sided?
- Double-sided, flip on the long edge. Every front sheet is followed by its own already-mirrored back sheet, so print them in the order they come and every answer lands on its own card.
- Can I edit the cards?
- Yes, and that is half the point. Once you own the deck, the "Buy & edit" button here opens all 23 cards in the free flash card maker on this site — reword a definition, delete the ones you do not teach, add your own, and print at anything from two to nine cards a page, rather than the fixed eight of the PDF.
- Can I print a set for every student?
- Yes. Personal and classroom licence: unlimited printing, every class you teach, every year you teach it. It does not cover reselling the file or passing it on to a colleague.
- What if I find a card that is wrong?
- Tell us and we fix it, and we publish what changed. We have withdrawn a whole deck from sale for being out of date rather than quietly patch it.
- Do I need an account?
- No. The file downloads straight away — no account, no email, no card details.