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Table 1 Various morphological measurements of the baculum and penis

From: The penile baculum in monkey (Macaca radiata), rat (Rattus norvegicus), and bat (Pipistrellus mimus) and its functional significance—a mini review

Parameter studied

Monkey

Rat

Bat

Baculum

21.5 ± 0.11 mm

9 ± 0.50 mm

> 1 mm

Diameter

2.85 ± 0.08 mm

0.50 ± 0.02 mm

108 ± 0.10 μm

Penis

Length (corpus + radix)

8 ± 2.15 cm

3.5 ± 0.69 cm

7 ± 1.15 mm

Breadth

1.3 ± 0.28 cm

4 ± 0.22 mm

1 ± 0.14 mm

Width

1.5 ± 0.35 cm

5.5 ± 1.68 mm

1.58 ± 0.21 mm

Volume

15 ± 2.48 cm3

0.300 ± 0.45 cm3

50 ± 12 mm3

Weight

17 ± 2.10 g

0.330 ± 0.41 mg

0.004 ± 0.001 mg

Circumference

4.85 ± 1.01 cm

1.75 ± 0.27 cm

4.5 ± .87 mm