h

0.25

mm³

1

Surface Area versus Volume Use the buttons on the left to change the size of this flatworm. Watch how its external surface area (SA) changes compared to its internal volume (V). The larger an animal, the smaller the ratio of its surface area to internal volume (SA:V).

8

mm

w

mm²

l

0.75

Flatworm

1X

10X

10.7

© 2024 Visionlearning, Inc.

SA

Pseudobiceros hankockanus

V

Back to module

3

SA:V

2X

Surface Area versus Volume

Flatworm

Use the buttons below to change the size of this flatworm. Watch how its external surface area (SA) changes compared to its internal volume (V). The larger an animal, the smaller the ratio of its surface area to internal volume (SA:V).

0.5

2

6

32

5.3

1.07

30

800

750

2.5

10