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Anatomical Heart Amigurumi Pattern

Anatomical Heart Amigurumi Pattern
4.1★ Rating
5-7 Hours Time Needed
2.8K Made This
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Intermediate Level

Ideal for those with basic crochet experience, featuring slightly more advanced stitches and techniques to expand your skills.

⏱️

Weekend Treat

Takes 5-7 hours, making it an enjoyable project to finish over a couple of days.

🧸

Cute Companion

An adorable friend to cherish, handcrafted with love to bring comfort and joy for years to come.

About This Anatomical Heart Amigurumi Pattern

This pattern creates a realistic-style anatomical heart amigurumi with separate crocheted arteries and veins for attaching to the heart body. The instructions are written round-by-round so you can follow each increase, decrease and shaping step precisely. It includes small details for the aortic arch, pulmonary arteries, veins, and guidance for sewing everything together.

Anatomical Heart Amigurumi Pattern crochet pattern - detailed view of completed project

Great for stitchers who enjoy small toy construction and detailed finishing work. The pattern uses simple single crochet shaping and clear assembly photos to help you place each vessel accurately.

Why You'll Love This Anatomical Heart Amigurumi Pattern

I absolutely love this pattern because it turns a scientific subject into a playful crochet project that still respects anatomical shapes. I enjoy how each small tube and arch is crocheted separately and then assembled — it makes the process relaxing and modular. I love the way embroidery lines add realistic arteries and veins to the finished piece. Making this pattern always feels like creating a tiny piece of art that also teaches and delights.

Anatomical Heart Amigurumi Pattern step 1 - construction progress Anatomical Heart Amigurumi Pattern step 2 - assembly progress Anatomical Heart Amigurumi Pattern step 3 - details and accessories Anatomical Heart Amigurumi Pattern step 4 - final assembly and finishing

Switch Things Up

I love how easy it is to customize this pattern by changing yarn colors—try pastel shades for a softer, whimsical heart or high-contrast colors for a graphic look.

You can make a mini keychain version by switching to thinner yarn and a smaller hook for a pocket-sized heart.

If you want a larger display piece, use bulkier yarn and a larger hook; remember to adjust stuffing to keep the shape smooth and proportional.

I often add embroidered veins in a slightly darker or lighter shade to emphasize detail—use simple straight stitches with a yarn needle to follow photo guides.

Try adding a little loop at the top to hang your heart as an ornament or educational model; a short chain and a few slip stitches make a tidy hanging loop.

For a tactile version, I sometimes insert a small bell or crinkle material inside before closing to create a sensory toy (securely enclose so nothing escapes).

I like experimenting with metallic or variegated yarn for a unique finish—this gives a different visual texture to the arteries and veins.

You can sew on tiny felt labels or embroidered initials for a personalized gift that also teaches anatomy.

Consider stuffing more firmly for a sturdier display or less for a softer, squeezable toy—adjust based on how you plan to use the heart.

For posability, I have tried adding a short wire inside longer vessels (carefully wrapped) so they hold a curve; use this sparingly and ensure ends are hidden for safety.

Common Mistakes & How to Fix Them

✗ Skipping use of a stitch marker causes losing track of the round start; place a marker in the first stitch of every round to stay on track and avoid miscounts. ✗ Not stuffing as you go leads to lumps or an uneven heart shape; stuff small amounts gradually and shape the piece with your fingers as you go for a smooth finish. ✗ Pulling the magic ring tail too tightly before a few rounds can distort the opening; close the ring tightly after a couple of rounds or tighten again after a round or two to ensure a neat center. ✗ Forgetting to hide and secure tails results in loose ends; leave tails for sewing, weave them into the fabric, and hide them inside the piece before final assembly.

Anatomical Heart Amigurumi Pattern

Bring a tiny anatomical heart to life with this detailed amigurumi pattern. You will make a stuffed heart with arteries and veins using simple amigurumi techniques and clear round-by-round instructions. Perfect for gifting, teaching anatomy, or decorating your space with a handmade twist. Follow the step-by-step rounds, assembly tips, and photos to complete your heart.

Intermediate 5-7 Hours

Materials Needed for Anatomical Heart Amigurumi Pattern

— Main Fabric

  • 01
    50 g / 160 m fingering/light yarn (example: YarnArt Jeans or Alize Cotton Gold) - RED (main body) approx 50g
  • 02
    Navy yarn (for pulmonary arteries) approx 10-20g
  • 03
    Blue yarn (for superior vena cava or other vessel) approx 10-20g
  • 04
    Orange or Pink yarn (for pulmonary veins) approx 10-20g
  • 05
    Small amounts of white or pale yarn for surface embroidery details

— Tools Required

  • 01
    Crochet hook size 1.75 mm to 2.5 mm depending on brand
  • 02
    Scissors
  • 03
    Sewing needle for yarn
  • 04
    Stitch markers
  • 05
    Polyester stuffing
  • 06
    Pins for assembly (optional)

Progress Tracker

0% Complete

— Heart :

Info :

Keep stuffing the heart as you go.

Round 1 :

R1: 6 sc in MR. Pull tail tightly to close: grab the yarn tail and pull down. You will need to hold your stitches still to get the ring to close. As you do this, the turning chain and the last stitch of the round will come closer together. I often will pull mine tight again after another round or two just to make sure it’s closed tightly.

Info :

We are working in a continuous spiral, so do not join the round with a slip stitch. Start the next round in the first stitch of Round 2.

Round 2 :

R2: 6 inc (12)

Round 3 :

R3: (1 sc, inc) x 6 (18)

Round 4 :

R4: (2 sc, inc) x 6 (24)

Round 5 :

R5: (3 sc, inc) x 6 (30)

Round 6-7 :

R6-7: 30 sc

Round 8 :

R8: (4 sc, inc) x 6 (36)

Round 9 :

R9: 36 sc

Round 10 :

R10: (5 sc, inc) x 6 (42)

Round 11 :

R11: 42 sc

Round 12 :

R12: (6 sc, inc) x 6 (48)

Round 13 :

R13: 48 sc

Round 14 :

R14: (7 sc, inc) x 6 (54)

Round 15-18 :

R15-18 (4 rounds): 54 sc

Round 19 :

R19: (7 sc, dec) x 6 (48)

Round 20-22 :

R20-22 (3 rounds): 48

Round 23 :

R23: (6 sc, dec) x 6 (42)

Round 24-25 :

R24-25: (2 rounds) 42

Round 26 :

R26: (4 sc, dec) x 7 (35)

Round 27 :

R27: 35 sc

Round 28 :

R28: (3 sc, dec) x 7 (28)

Round 29 :

R29: (3 sc, dec) x 5, 3sc (23)

Round 30 :

R30: (sc, dec) x 7, 2sc (16)

Round 31 :

R31: (1 sc, dec) repeat to the end. Sew up a hole with needle – just grab «Front loop only» in this Round. Pull tail tightly to close. Fasten off, cut yarn.

— AORTA (red) :

Item Name (Big aortic arch) :

Big (1 detail: aortic arch) R1: 12 sc in MR. Don't pull tail. We don't need to close the hole. We are working in a continuous spiral, so do not join the round with a slip stitch. Start the next round in the first stitch of Round 2.

Round 2-24 :

R2-R24: 12 sc, slip stitch. Fasten off, leaving a tail for sewing.

Item Name (Small aortic details) :

Small (3 details: - Brachiocephalic artery, - Left common carotid artery, - left subclavian artery) R1: 6 sc in MR. Pull tail tightly to close: grab the yarn tail and pull down. You will need to hold your stitches still to get the ring to close.

Round 2-4 :

R2-R4: 6 SC, slip stitch. Fasten off, leaving a tail for sewing. Sew 3 small details to the big detail (aortic arch). Hide tail. Cut yarn. Sew aortic arch to the heart.

— PULMONARY ARTERIES (navy) :

Item Name (Big pulmonary artery) :

Big (1 detail) R1: 10 sc in MR. Pull tail. Don't join.

Round 2-16 :

R2-R16: 10 SC, SS. Hide tail. Cut yarn.

Item Name (Small pulmonary detail) :

Small (1 details) R1: 8 sc in MR. Don't pull tail. We don't need to close the hole.

Round 2-8 :

R2-R8: 8 SC, SS. Sew small detail to the center big detail. Hide tail. Cut yarn. Sew on the heart’s side, perpendicular to the aorta.

— SUPERIOR VENA CAVA (blue) :

Item Name (Big superior vena cava) :

Big (1 detail) R1: 12 sc in MR. Don't pull tail. We don't need to close the hole.

Round 2-10 :

R2-R10: 12 SC, SS. Hide tail. Cut yarn.

— PULMONARY VEINS (orange or pink) :

Item Name (Left pulmonary veins) :

2 LEFT PULMONARY VEINS (orange or pink): R1: 6 sc in MR. Don't pull tail. We don't need to close the hole. Start the next round in the first stitch of Round 2.

Round 2-4 :

R2-R4: 6 SC, SS. Hide tail.

Item Name (Right pulmonary veins) :

2 RIGHT PULMONARY VEINS (orange or pink): R1: 6 sc in MR. Don't pull tail. We don't need to close the hole. Start the next round in the first stitch of Round 2.

Round 2-4 :

R2-R4: 6 SC, SS. Hide tail.

— Small details & finishing :

Info :

Sew 2 details to the left side. Sew 2 details to the right side. (Look to the photo.) Embroider arteries on the heart with contrasting yarn for surface veins and arteries as shown in the photos.

Assembly Instructions

  • Sew the big aortic arch (red) to the top of the heart, positioning the arch to match the photo references and sewing securely with the long tail left from the piece.
  • Attach the three small aortic details (brachiocephalic, left common carotid, left subclavian) to the aortic arch by sewing them to the big detail before the arch is attached to the heart.
  • Position and sew the pulmonary arteries and veins (navy, blue, orange/pink) to the heart using photos as placement guides; hide tails inside the body and secure with whipstitch.
  • Embroider surface arteries and veins on the heart with contrasting yarn using simple straight or chain stitches to follow the photo lines and add realistic detail.

Important Notes

  • 💡Crochet continuously in rounds unless otherwise specified; do not join rounds with slip stitch unless the pattern tells you.
  • 💡Use a stitch marker at the beginning of each round to avoid skipping worked stitches and to track the round start.
  • 💡Stuff gradually while shaping the pieces; insert small amounts of stuffing at a time to avoid lumps and achieve the correct shape.

This tiny anatomical heart is designed to delight makers and learners alike, combining precise shaping with playful details. Whether you gift it to a friend or use it as a study prop, this heart makes a memorable handmade keepsake. Happy stitching and enjoy every stitch of creation! 🧶💖

You ask,

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FAQs

What size will the finished piece be?

The finished amigurumi heart is approximately 4-5 inches (10-12 cm) tall when using the recommended yarn and hook size.

Can I use different yarn weights for this pattern?

Yes, you can use different yarn weights, but this will affect the final size. Adjust the hook size accordingly; a thinner yarn with a smaller hook makes a smaller heart, while bulkier yarn and a larger hook make a larger, chunkier toy.

Do I need prior crochet experience for this pattern?

This pattern is rated intermediate and uses continuous rounds, increases and decreases; basic experience with single crochet, magic ring, increasing and decreasing is recommended.

How long does this project typically take to complete?

Most crocheters complete this project in 5-7 hours, though time may vary based on experience level, number of details you add, and your finishing techniques.