313
edits
Barnacle: Difference between revisions
From CreationWiki, the encyclopedia of creation science
Jump to navigationJump to search
no edit summary
No edit summary |
No edit summary |
||
| Line 32: | Line 32: | ||
== Anatomy == | == Anatomy == | ||
[[File:Barnacle_anatomy.jpg|left|225px|Barnacle anatomy diagram]]There are several parts that make up a barnacle. The outermost layer of a barnacle is its shell; the shell of the adult barnacle is usually composed of four to eight calcareous plates which can form different shapes depending on the species of barnacle.[http://www.mesa.edu.au/friends/seashores/barnacles.html] The entrance to the barnacle is also covered by two calcareous plates which can pull back to open up or close this portal to the interior of the barnacle.[http://museumvictoria.com.au/crust/barnbiol.html] These plates will grow and expand by adding more material to itself. | [[File:Barnacle_anatomy.jpg|thumb|left|225px|Barnacle anatomy diagram]]There are several parts that make up a barnacle. The outermost layer of a barnacle is its shell; the shell of the adult barnacle is usually composed of four to eight calcareous plates which can form different shapes depending on the species of barnacle.[http://www.mesa.edu.au/friends/seashores/barnacles.html] The entrance to the barnacle is also covered by two calcareous plates which can pull back to open up or close this portal to the interior of the barnacle.[http://museumvictoria.com.au/crust/barnbiol.html] These plates will grow and expand by adding more material to itself. | ||
[http://en.wikipedia.org/wiki/Barnacle] | [http://en.wikipedia.org/wiki/Barnacle] | ||
The plates that cover the opening to the barnacle are operated by several sets of muscles: the scutal depressor muscles, the scutal abductor muscle, and the tergal depressor muscle. These are used to open and close the the plates that cover the opening to the barnacle.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] | The plates that cover the opening to the barnacle are operated by several sets of muscles: the scutal depressor muscles, the scutal abductor muscle, and the tergal depressor muscle. These are used to open and close the the plates that cover the opening to the barnacle.[http://webs.lander.edu/rsfox/invertebrates/balanus.html] | ||
| Line 43: | Line 43: | ||
== Reproduction == | == Reproduction == | ||
[[File:Barnacle_nauplius.jpg|left|225px|A Barnacle nauplius]]Barnacles are [[hermaphrodites]] that reproduce by cross-fertilization. This means that they have both male and female reproductive organs, but they fertilize with other barnacles and not with themselves.[http://www.infoplease.com/ce6/sci/A0856850.html] | [[File:Barnacle_nauplius.jpg|thumb|left|225px|A Barnacle nauplius]]Barnacles are [[hermaphrodites]] that reproduce by cross-fertilization. This means that they have both male and female reproductive organs, but they fertilize with other barnacles and not with themselves.[http://www.infoplease.com/ce6/sci/A0856850.html] | ||
The life process of a barnacle consists of three stages. The nauplius, the cyprid, and the adult stage.[http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | The life process of a barnacle consists of three stages. The nauplius, the cyprid, and the adult stage.[http://www.absoluteastronomy.com/topics/Barnacle#encyclopedia] | ||
