a human heart

BeginnerUS TerminologyModular

A stylized human heart model, showing the main chambers and major arteries. The heart is approximately 6 inches tall, with a rounded bottom and branching vessels on top.

Materials

Yarn

WORSTED · 200yd

Hook

6mm

Notions

Tapestry needle

Stitch markers

Gauge

17 sts × 20 rows = 4in × 4in (in single crochet)

Stitches Used

sc = single crochet
ch = chain
inc = increase
dec = decrease

Pattern

Main Body

R1Magic ring, 1 sc in ring. (1)(1 sts)
R2[Sc 0, inc] repeat around. (21)(21 sts)
R3[Sc 3, inc] repeat around. (28)(28 sts)
R4[Sc 5, inc] repeat around. (33)(33 sts)
R5[Sc 11, inc] repeat around. (36)(36 sts)
R6[Sc 18, inc] repeat around. (38)(38 sts)
R7[Sc 19, inc] repeat around. (40)(40 sts)
R8Sc in each st around. (40)(40 sts)
R9Sc in each st around. (40)(40 sts)
R10[Sc 19, dec] repeat around. (38)(38 sts)
R11[Sc 18, dec] repeat around. (36)(36 sts)
R12[Sc 11, dec] repeat around. (33)(33 sts)
R13[Sc 5, dec] repeat around. (28)(28 sts)
R14[Sc 3, dec] repeat around. (21)(21 sts)
R15[Sc 0, dec] repeat around. (1) Stuff firmly before closing. Fasten off.(1 sts)

Left Atrium / Right Atrium (make 2)

R1Pick up 31 sc evenly around opening. (31)(31 sts)
R2[Sc 0, dec] repeat around. (1)(1 sts)
R3[Sc 0, inc] repeat around. (15)(15 sts)
R4[Sc 3, inc] repeat around. (19)(19 sts)
R5[Sc 9, inc] repeat around. (21)(21 sts)
R6Sc in each st around. (21)(21 sts)
R7[Sc 9, dec] repeat around. (19)(19 sts)
R8[Sc 3, dec] repeat around. (15)(15 sts)
R9[Sc 0, dec] repeat around. (1) Stuff firmly before closing. Fasten off, leaving 12-inch tail for sewing.(1 sts)

Right Atrium

R1Same as Left Atrium.(0 sts)

Aorta

R1Pick up 22 sc evenly around opening. (22)(22 sts)
R2[Sc 21, dec] repeat around. (21)(21 sts)
R3[Sc 9, dec] repeat around. (19)(19 sts)
R4[Sc 18, dec] repeat around. (18)(18 sts)
R5[Sc 8, dec] repeat around. (16)(16 sts)
R6Sc in each st around. (16)(16 sts)
R7[Sc 15, dec] repeat around. (15)(15 sts)
R8Sc in each st around. (15)(15 sts)
R9Sc in each st around. (15)(15 sts)
R10Sc in each st around. (15)(15 sts)
R11[Sc 14, dec] repeat around. (14)(14 sts)
R12Sc in each st around. (14)(14 sts)
R13Sc in each st around. (14)(14 sts)
R14[Sc 13, dec] repeat around. (13) Stuff lightly. Fasten off, leaving 12-inch tail for sewing.(13 sts)

Pulmonary Artery

R1Pick up 18 sc evenly around opening. (18)(18 sts)
R2[Sc 1, dec] repeat around. (11)(11 sts)
R3Sc in each st around. (11)(11 sts)
R4Sc in each st around. (11)(11 sts)
R5Sc in each st around. (11)(11 sts)
R6Sc in each st around. (11)(11 sts)
R7Sc in each st around. (11)(11 sts)
R8Sc in each st around. (11)(11 sts)
R9Sc in each st around. (11) Stuff lightly. Fasten off, leaving 12-inch tail for sewing.(11 sts)