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Anatomical Heart Amigurumi Pattern

Anatomical Heart Amigurumi Pattern
4.2★ Rating
5-7 Hours Time Needed
3.1K 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.

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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 small plush anatomical heart amigurumi complete with aorta, pulmonary arteries, veins and smaller vessel details. You will crochet the main heart body in rounds, then make and attach multiple smaller tubular details to resemble vessels. The design uses simple amigurumi shaping and sewing techniques to produce a charming educational toy or decorative piece.

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

Clear round-by-round instructions are included for every piece, plus diagrams and photos to help with placement. Suitable for crocheters comfortable with continuous rounds and small-detail work.

Why You'll Love This Anatomical Heart Amigurumi Pattern

I absolutely love this pattern because it blends playful crochet with anatomical detail in a way thats both fun and rewarding. I enjoy the shaping process that brings the heart body to life, and the small vessel pieces are satisfying to make and arrange. Sewing the details on is my favorite part — it transforms simple shapes into a cohesive, charming mini heart. I find this pattern perfect for gift-making or as a unique classroom prop because it is small, tactile, and full of character.

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 and sizes to make different looks.

You can substitute sport weight yarn for DK or fingering; using a larger hook will create a chunkier, cuddly heart while a smaller hook will make a more detailed mini version.

I often swap the accent colors for pastel shades to create a softer decorative piece instead of the realistic red and blue palette.

I also like to add embroidery lines with contrasting yarn to emphasize arteries or add a name or date for gifting.

Try needle felting a tiny highlight or blush onto the heart for a mixed-media effect if youre comfortable with felting tools.

For a keychain version, make the heart smaller and leave a long tail to attach a keyring before stuffing the final rounds.

I sometimes add a small loop at the top in Round 1 to hang the heart as an ornament or tag.

Consider using variegated yarn for an artistic, marbled vessel look — it adds visual interest to the surface stitches.

If you want more structural stability, insert a small wireframe inside longer tubular details so they hold their pose.

Dont be afraid to experiment with embroidery stitches and bead accents to make your version uniquely yours; I always enjoy seeing personal touches added to the pieces I design.

Common Mistakes & How to Fix Them

✗ Skipping a stitch marker in continuous rounds can make you lose track of the start of each round; place a marker at the first stitch of every round to stay aligned. ✗ Overstuffing the heart will distort its shape and make sewing details difficult; stuff gradually and shape with small amounts until you get a smooth contour. ✗ Pulling the magic ring too tight before you have a few rounds worked can close the hole unevenly; close the MR firmly after a couple of rounds or adjust tension after R2. ✗ Not hiding tails after sewing details will leave loose ends visible; weave tails into seams carefully and trim to keep the finished look neat. ✗ Skipping counts during increases and decreases causes uneven shaping and mismatched rounds; count your stitches after each round to verify totals.

Anatomical Heart Amigurumi Pattern

Make a charming, anatomically inspired amigurumi heart that is both adorable and educational. This pattern guides you through crocheting the heart body and the arteries, veins and vessels with clear step-by-step rounds and assembly directions. Youll enjoy shaping, stuffing, and sewing the small details to create a realistic mini heart that measures about 4-5 inches tall.

Intermediate 5-7 Hours

Materials Needed for Anatomical Heart Amigurumi Pattern

— Main Fabric

  • 01
    50 g / 160 m sport/light weight yarn (example: Yarnart Jeans or Alize Cotton Gold) - Main red approx 50g
  • 02
    Navy yarn - small amount for pulmonary arteries
  • 03
    Blue yarn - small amount for superior vena cava
  • 04
    Orange or Pink yarn - small amounts for pulmonary veins
  • 05
    Accent colors (light pink or white) - small amounts for embroidered vessels and details

— Tools Required

  • 01
    Crochet hook 1.75mm to 2.5mm depending on brand and preferred tension
  • 02
    Polyester stuffing (fiberfill)
  • 03
    Scissors
  • 04
    Sewing needle for sewing and embroidering details
  • 05
    Stitch markers
  • 06
    Pins for assembly (optional)
  • 07
    Yarn needle for weaving in ends

Progress Tracker

0% Complete

— Heart :

Info :

Keep stuffing the heart as you go.

Round 1 :

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.

Info :

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 :

6 inc (12)

Round 3 :

(1 sc, inc) x 6 (18)

Round 4 :

(2 sc, inc) x 6 (24)

Round 5 :

(3 sc, inc) x 6 (30)

Round 6-7 :

30 sc

Round 8 :

(4 sc, inc) x 6 (36)

Round 9 :

36 sc

Round 10 :

(5 sc, inc) x 6 (42)

Round 11 :

42 sc

Round 12 :

(6 sc, inc) x 6 (48)

Round 13 :

48 sc

Round 14 :

(7 sc, inc) x 6 (54)

Round 15-18 :

(4 rounds): 54 sc

Round 19 :

(7 sc, dec) x 6 (48)

Round 20-22 :

(3 rounds): 48

Round 23 :

(6 sc, dec) x 6 (42)

Round 24-25 :

(2 rounds) 42

Round 26 :

(4 sc, dec) x 7 (35)

Round 27 :

35 sc

Round 28 :

(3 sc, dec) x 7 (28)

Round 29 :

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

Round 30 :

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

Round 31 :

(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) :

Info :

Big (1 detail: aortic arch)

Round 1 :

12 sc in MR. Don't pull tail. We don't need to close the hole.

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-Round 24 :

12 sc, slip stitch. Fasten off, leaving a tail for sewing.

Item Name (P1) :

Small (3 details: - Brachiocephalic artery, - Left common carotid artery, - left subclavian artery)

Round 1 :

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-Round 4 :

6 SC, slip stitch. Fasten off, leaving a tail for sewing.

Info :

Sew 3 small details to the big detail (aortic arch). Hide tail. Cut yarn.

Info :

Sew aortic arch to the heart.

— PULMONARY ARTERIES (navy) :

Info :

Big (1 detail)

Round 1 :

10 sc in MR. Pull tail. Don’t join.

Round 2-Round 16 :

10 SC, SS. Hide tail. Cut yarn.

Item Name (P1) :

Small (1 detail)

Round 1 :

8 sc in MR. Don't pull tail. We don't need to close the hole.

Round 2-Round 8 :

8 SC, SS. Sew small detail to the center big detail. Hide tail. Cut yarn.

Info :

Sew on the heart's side, perpendicular to the aorta.

— SUPERIOR VENA CAVA (blue) :

Info :

Big (1 detail)

Round 1 :

12 sc in MR. Don't pull tail. We don't need to close the hole.

Round 2-Round 10 :

12 SC, SS. Hide tail. Cut yarn.

Info :

Small (1 details)

Round 1 :

6 sc in MR. Pull tail tightly to close. Don't join the round with a slip stitch. Start the next round in the first stitch of Round 2.

Round 2-Round 5 :

6 SC, SS. Sew small detail to the big detail. Hide tail and cut yarn.

Info :

Sew detail on the opposite side of the pulmonary arteries.

— PULMONARY VEINS (orange or pink) :

Info :

2 LEFT PULMONARY VEINS (orange or pink)

Round 1 :

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-Round 4 :

6 SC, SS. Hide tail.

Info :

2 RIGHT PULMONARY VEINS (orange or pink)

Round 1 :

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-Round 4 :

6 SC, SS. Hide tail.

— Assembly & Finishing :

Info :

Sew 2 details to the left side of the heart and 2 details to the right side (refer to photos for exact placement).

Info :

Embroider arteries on the heart with contrasting yarn to create vessel lines and highlights.

Assembly Instructions

  • Sew the big aortic arch to the top of the heart, aligning the arch so it curves naturally over the heart body and sew securely with hidden stitches.
  • Attach the three small aortic details (brachiocephalic, left common carotid, left subclavian) onto the aortic arch detail, hiding tails and trimming yarn.
  • Position and sew the pulmonary arteries perpendicular to the aorta on the heart's side; use photos as a placement guide for natural spacing.
  • Sew the superior vena cava and pulmonary veins in place, tucking ends inside the heart and securing each piece so it sits firmly against the body.
  • Embroider arteries on the heart surface using contrasting yarn to recreate vessel lines; pin placement points before sewing to ensure symmetry.

Important Notes

  • 💡Crochet continuously in rounds unless otherwise specified and use a stitch marker to mark the first stitch of each round.
  • 💡Keep stuffing gradually and shape pieces while stuffing to avoid lumps; overstuffing will distort the shape.
  • 💡Hide and weave in tails after sewing each detail to maintain a neat finish and prevent unraveling.
  • 💡Do not join rounds with a slip stitch when instructed; start the next round in the first stitch to work in a continuous spiral.

This anatomical heart amigurumi brings a playful, scientific twist to crochet and makes a thoughtful handmade gift. It combines shaping, small-tube details, and embroidery for a finished piece thats perfect for display or teaching. Create one as a unique ornament, gift, or classroom prop and enjoy personalizing each vessel and stitch. 🧶❤️✨

You ask,

we answer.

FAQs

What size will the finished piece be?

The finished amigurumi heart measures approximately 4-5 inches (10-12 cm) tall when made with 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 change the final size; choose an appropriate hook for the yarn and expect adjustments to stitch counts and proportions.

Do I need prior crochet experience for this pattern?

This pattern is rated intermediate, so a basic knowledge of single crochet, increases, decreases, and working in continuous rounds 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, speed, and how many details you make.

How should I stuff the pieces to get the best shape?

Stuff gradually and shape as you go, adding small amounts to avoid lumps; overstuffing will distort the rounded heart shape and make sewing parts harder.