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Anatomical Heart Amigurumi Pattern

Anatomical Heart Amigurumi Pattern
4.7★Rating
3-5 HoursTime Needed
2.8KMade This
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Intermediate Level

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

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Quick Craft

Fits nicely into a free afternoon — 2 to 5 hours of focused, enjoyable crocheting.

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Tiny Treasure

Small, sweet, and gift-worthy creations that fit perfectly in the palm of your hand with detailed charm.

About This Anatomical Heart Amigurumi Pattern

Anatomical Heart Amigurumi Pattern crochet pattern - detailed view

Whether you're making this as a study aid for a student or a thoughtful recovery gift, the finished heart is a palm-sized treasure that looks incredible on a bookshelf or desk.

Why You'll Love This Anatomical Heart Amigurumi Pattern

I really enjoy how this pattern breaks down a complex organ into simple, manageable sections. There's something so rewarding about seeing the heart take shape as you add each vessel, and the final embroidery is where you can really let your creativity shine!

Anatomical Heart Amigurumi Pattern step 1 Anatomical Heart Amigurumi Pattern step 2 Anatomical Heart Amigurumi Pattern step 3 Anatomical Heart Amigurumi Pattern step 4

Switch Things Up

I remember the first time I saw an anatomical heart pattern; I was so intimidated by all the little bits and pieces! But honestly, once you get going, it’s such a blast. I found that using a slightly darker, oxblood red for the main body really gives it a sophisticated look, while the bright blue and navy vessels pop beautifully against it.

One little trick I learned while making this: when you're sewing the vessels on, use plenty of pins first. It looks like a pincushion for a minute, but it's the only way to make sure everything stays symmetrical. If you're feeling extra creative, you could even add a little loop to the top and turn it into a quirky bag charm or a car mirror ornament.

I also love the idea of using variegated yarn for the embroidered veins on the surface. It adds a bit of depth and makes the heart look even more detailed without any extra effort. Just take your time with the assembly—that's where the magic really happens and the personality of your heart comes through. Happy crafting!

Common Mistakes & How to Fix Them

✗ When working the Aorta, don't pull the magic ring tight on Round 1 as instructed — if you close it, you won't get that hollow tube look for the vessel.✗ If you stuff the main heart too firmly at the bottom, it might lose its slightly tapered shape and look more like a ball than an anatomical organ.✗ Be careful when sewing the small vessels to the Aorta; if they aren't spaced out, the 'arch' won't curve naturally when you attach it to the heart.✗ The stitch counts in Rounds 29 and 30 are a bit unusual, so double-check your repeats to make sure you end up with the right number for the final closure.

Anatomical Heart Amigurumi Pattern

This project is such a fascinating way to blend science with craft. You'll create a realistic, three-dimensional heart complete with all its major vessels, making it a standout piece in any collection. I love how the different textures and colors come together to make something so complex feel approachable and fun to stitch. It's the perfect gift for the medical professional or biology enthusiast in your life!

Intermediate 3-5 Hours

Materials Needed for Anatomical Heart Amigurumi Pattern

— Main Fabric

  • 01
    Approx 40g of Sport weight cotton-blend yarn in deep red
  • 02
    Small amounts of navy blue and bright blue yarn for the major vessels
  • 03
    Scraps of pink or orange yarn for the smaller pulmonary veins
  • 04
    Light pink or red thread for the surface embroidery

— Tools Required

  • 01
    2.0mm or 2.25mm crochet hook
  • 02
    Polyester fiberfill for stuffing
  • 03
    Tapestry needle for sewing and embroidery
  • 04
    Sharp scissors
  • 05
    Stitch markers to keep track of continuous rounds

Progress Tracker

0% Complete

— 1. The Heart Body :

Info :

We'll be working in a continuous spiral for the main heart, so don't join your rounds with a slip stitch unless mentioned. Keep adding stuffing as you work to maintain a nice shape.

Round 1 :

Start with 6 sc into a MR. Pull the yarn tail firmly to close the center. (6)

Round 2 :

Work 1 inc into every stitch around. (12)

Round 3 :

Repeat (1 sc, 1 inc) 6 times. (18)

Round 4 :

Repeat (2 sc, 1 inc) 6 times. (24)

Round 5 :

Repeat (3 sc, 1 inc) 6 times. (30)

Round 6-7 :

Work 1 sc in every stitch for these two rounds. (30)

Round 8 :

Repeat (4 sc, 1 inc) 6 times. (36)

Round 9 :

Work 1 sc in every stitch around. (36)

Round 10 :

Repeat (5 sc, 1 inc) 6 times. (42)

Round 11 :

Work 1 sc in every stitch around. (42)

Round 12 :

Repeat (6 sc, 1 inc) 6 times. (48)

Round 13 :

Work 1 sc in every stitch around. (48)

Round 14 :

Repeat (7 sc, 1 inc) 6 times. (54)

Round 15-18 :

Work 1 sc in every stitch for these four rounds. (54)

Round 19 :

Repeat (7 sc, 1 dec) 6 times. (48)

Round 20-22 :

Work 1 sc in every stitch for these three rounds. (48)

Round 23 :

Repeat (6 sc, 1 dec) 6 times. (42)

Round 24-25 :

Work 1 sc in every stitch for these two rounds. (42)

Round 26 :

Repeat (4 sc, 1 dec) 7 times. (35)

Round 27 :

Work 1 sc in every stitch around. (35)

Round 28 :

Repeat (3 sc, 1 dec) 7 times. (28)

Round 29 :

Repeat (3 sc, 1 dec) 5 times, then work 3 sc. (23)

Round 30 :

Repeat (1 sc, 1 dec) 7 times, then work 2 sc. (16)

Round 31 :

Repeat (1 sc, 1 dec) until the end of the round. Use a needle to weave through the front loops only of the remaining stitches and pull tight to close. Fasten off and hide the tail. (11)

— 2. Aortic Arch (Red) :

Round 1 :

Work 12 sc into a MR. Do not pull the center closed; we want a hollow tube. (12)

Round 2-24 :

Work 1 sc in every stitch around. Finish with 1 ss. Leave a long tail for sewing. (12)

— 3. Small Aortic Vessels (Red - Make 3) :

Round 1 :

Work 6 sc into a MR and pull the tail tight to close the center. (6)

Round 2-4 :

Work 1 sc in every stitch around. Finish with 1 ss. Leave a tail for sewing. (6)

Info :

Sew these three small pieces onto the big aortic arch before attaching the arch to the heart.

— 4. Main Pulmonary Artery (Navy) :

Round 1 :

Work 10 sc into a MR. Pull the tail but do not join the round. (10)

Round 2-16 :

Work 1 sc in every stitch around. Finish with 1 ss. Fasten off. (10)

— 5. Branch Pulmonary Artery (Navy) :

Round 1 :

Work 8 sc into a MR. Do not pull the center tail closed. (8)

Round 2-8 :

Work 1 sc in every stitch around. Finish with 1 ss. (8)

Info :

Sew this smaller branch to the center of the navy main artery piece.

— 6. Superior Vena Cava - Main (Blue) :

Round 1 :

Work 12 sc into a MR. Do not pull the tail closed. (12)

Round 2-10 :

Work 1 sc in every stitch around. Finish with 1 ss. (12)

— 7. Superior Vena Cava - Branch (Blue) :

Round 1 :

Work 6 sc into a MR. Pull the tail tight and don't join the round. (6)

Round 2-5 :

Work 1 sc in every stitch around. Finish with 1 ss. (6)

Info :

Attach this small branch to the main blue vena cava piece.

— 8. Pulmonary Veins (Pink/Orange - Make 4) :

Round 1 :

Work 6 sc into a MR. Do not pull the center hole closed. (6)

Round 2-4 :

Work 1 sc in every stitch around. Finish with 1 ss. (6)

Assembly Instructions

  • Start by sewing the three tiny red vessels onto the top of the long aortic arch piece.
  • Curve the completed aorta over the top of the heart and secure both ends firmly with your tapestry needle.
  • Attach the navy pulmonary artery piece to the side of the heart, making sure it sits perpendicular to the aorta.
  • Fix the blue vena cava on the opposite side of the heart from the navy vessels.
  • Sew the four pink pulmonary veins in pairs — two on the left side and two on the right side of the heart body.
  • Use a lighter shade of yarn to embroider thin branching lines across the surface of the heart to represent the coronary arteries.

Important Notes

  • 💡Use a smaller hook than you normally would for this yarn weight to ensure the stuffing doesn't peek through the stitches.
  • 💡Stuff the main heart gradually as you work the decrease rounds to keep the shape smooth and lump-free.
  • 💡Leave long yarn tails on all the smaller pieces to make the assembly process much easier later on.
  • 💡When embroidering the surface details, try to keep your stitches loose so they don't pull on the fabric and distort the heart shape.

I hope you had as much fun making this anatomical heart as I did! It’s such a rewarding project that combines technical shaping with creative finishing touches. Whether you’re keeping it for your own collection or gifting it to a heart warrior, it’s a piece made with literal love. Don't forget to share your finished photos — I'd love to see the colors you chose! Happy stitching and enjoy your new handmade treasure. 🧶 ❤️ ✨

You ask,

we answer.

FAQs

Can I use acrylic yarn instead of a cotton blend?

You definitely can, but cotton or cotton-blend yarns tend to hold the anatomical shape better and show off the stitch definition for the vessels more clearly.

How do I make the heart larger?

The easiest way is to use a thicker yarn like worsted weight and a larger hook (like 3.5mm or 4.0mm). This will scale the whole project up naturally.

Do I need to stuff the vessels?

The smaller vessels usually hold their shape without stuffing, but you might want to add a tiny bit to the larger aortic arch to keep it from collapsing.

What if my stitch count is off by one in the later rounds?

Because the heart is an organic shape, being off by a single stitch in the final rounds won't be noticeable. Just add an extra decrease to get back on track.