Jellyfish - a photo on Flickriver

Jellyfish

            Jellyfish do not have specialized digestive, osmoregulatory, central nervous, respiratory, or circulatory systems. They digest using the gastrodermal lining of the gastrovascular cavity, where nutrients are absorbed. They do not need a respiratory system since their skin is thin enough that the body is oxygenated by diffusion. They have limited control over movement, but can use their hydrostatic skeleton to accomplish movement through contraction-pulsations of the bell-like body; some species actively swim most of the time, while others are passive much of the time.[citation needed] Jellyfish are composed of more than 90% water; most of their umbrella mass is a gelatinous material — the jelly — called mesoglea which is surrounded by two layers of epithelial cells which form the umbrella (top surface) and subumbrella (bottom surface) of the bell, or body.
A jellyfish does not have a brain or central nervous system, but rather has a loose network of nerves, located in the epidermis, which is called a "nerve net". A jellyfish detects various stimuli including the touch of other animals via this nerve net, which then transmits impulses both throughout the nerve net and around a circular nerve ring, through the rhopalial lappet, located at the rim of the jellyfish body, to other nerve cells.

Taken in: Nederland / Zuid-Holland / Rotterdam / Centrum-noord (show map)

Taken on: September 19, 2009

Tags:

GSAndré

Netherlands

Rotterdam

Oceanium

Blijdorp

Zoo

Animal

Fish

Sea

Aquarium

Floating

Black

Blue

Nikon

All_Nature's_Paradise

ringexcellence

“flickrAward”

“NikonflickrAward”

dblringexcellence

my_gear_and_me

Auto_Focus

NiceShot

blinkagain « less

Sets appears in: • Favorites @ Flickr • Zoo Blijdorp Rotterdam

Groups appears in: • FlickrCentral • Nederland/The Netherlands more » • Magic Moments • Flickritis: over 87,000 waiting for a vaccine. • FlickrToday (only 1 pic per day) • Fl♥ckr Hearts -- Post 1 & Give 3 Hearts - CLOSED • Beautiful Capture • Ik hou van Holland,.. I Love Holland ! • Available Light / Existing Light • Dragon Gold Award " The Best Of Flickr " • De Doka • Beautiful Shot (P1/A5) 25,100+ members!!! • Nikon flickr Award (Post 1 - Award 3) • !*Flickr Award Group*! (GIVE 5 AWARDS) • **Heart Awards** (P.1 Award 5) Open - Sweeper present • ***All beautiful shots and many more. • NATURE'S PRIME (P1/A4) • ***A Place For Great Photographers*** Administration Approval • [CLOSED]My Gear and Me #1 - (Post 1 - Award 5) • Dizajnersi [P1 / A2] • Blink Again - Post 1 - Comment 2 (no 30/60 limit ) • Fine Gold • Level 2 All Nature's Paradise (P/1 C/5) • Nature Beauties Post 1 Comment 2 • Level 3 All Nature's Paradise (P/1 C/5) • Level 4 All Nature's Paradise (P/1 C/5) • ` FLICKR ´ • Mi intriga - I am intrigued « less

Camera: Nikon D90, f/5.0, 1/30 sec, 52mm (=78mm), ISO 640 (more info) (hide info)

Camera:	Nikon D90
Aperture:	f/5.0
Exposure Time:	0.033 sec (1/30)
Focal Length:	52mm (35mm equivalent: 78mm)
ISO:	640
Exposure Bias:	-1 EV
Flash:	No Flash
Exposure Program:	Program AE
Exposure Mode:	Auto
Metering Mode:	Spot
White Balance:	Auto
Gain Control:	Low gain up
Color Space:	sRGB
Software:	Capture NX 2.1.1 W
Show full info

Stats: 7,461 views / 212 comments

go back

Link to this photo view:
Link to this photo large view: