Inside Out

Yo, your body’s a marvel, no need to pretend,
It’s science in motion from start to the end.
Behind every blink, every breath that you take,
Physiology’s working—make no mistake!

Heart goes thump, like a beat on a track,
Pumping that blood, no time to slack.
Arteries hustle, veins bring it back,
Oxygen rides like it’s first-class, no lack.

Lungs expand like wings in flight,
Pulling in air, day and night.
Gas exchange? That’s the game,
CO₂ out, O₂ claims fame.

Neurons fire in silent code,
Thoughts and actions smoothly flowed.
Your brain’s a boss, your spinal cord’s the street,
Signals dash down nerves like heat.

Muscles stretch and contract too,
Helping you smile or tie a shoe.
Tendons grip, and bones align,
A sturdy frame by grand design.

The gut? A wizard, let me explain,
Turns meals to fuel, again and again.
Stomach, liver, pancreas, team tight—
Breaking down food just right.

Endocrine’s the low-key star,
Sending hormones near and far.
Growth, sleep, moods that swing—
Tiny messengers controlling everything.

Skin’s a shield, the outerwear,
Senses touch, protects with care.
Sweat cools down when you're in heat,
That’s thermoregulation—pretty neat!

Kidneys clean, bladder stores,
They filter blood, close vital doors.
Urine’s made with secret grace,
Keeping toxins from the race.

Immune system? Straight up bold,
Fighting threats, brave and cold.
White cells patrol, on constant guard,
To keep your life from going hard.

All these systems, day and night,
Working silent, out of sight.
No applause, no break, no fame,
Yet every heartbeat sings their name.