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Osteichthyes

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by

Yoana Sidzhimova

on 11 March 2014

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Transcript of Osteichthyes

-Called "bony fish"
-They have an external skeleton that helps protect the internal organs (Exoskeleton)
- Most have scales
-Skin has mucous glands and embedded dermal scales.

Respiratory Organs
Ectothermic or Endothermic?
Body Covering
Body heat
Gas Exchange
Ectothermic
Endothermic
$1.25
By: Yoana, David and Logan

Vol XCIII, No. 311
Bowfin-Typical Example
Animals in Class
Heart of an Osteichthyes
Long, cylindrical fish with a prominent backbone that flexes upward into a rounded tail.
dorsal fin has 46 to 50 soft rays; it extends more than half the length of its back

-Osteichthyes have
a 2 chambered heart
-Their hearts have
arteries and veins
-The aortic arches are in their
gills
Osteichthyes
Flying Fish- Interesting Example

-They are not to be found in cold climates.
-They have been created with large fins, which spread out in the air like wings of a glider and enable the fish to glide through the air.
Seahorse- Atypical Example
- Unlike most other fish, they are monogamous and mate for life
-Male births the young
Fertilization
Most fish of the Osteichthyes class depend on the surrounding environment for their body temperatures.
EX: Bowfin
&
can produce their own body heat.



EX: Swordfish
Limb Structure
Development
3. Dorsal and Anal Fin-
help fish stay striaght in water and keep it from rolling.

2. Pelvic and Pectoral Fin-
Used from balancing and turning
1. Caudal Fin-
Propels the fish through water
Process
1.Water goes into gill chamber in fish's mouth
2. Water exits through gill opening under operculum
3. Blood flowing through gill filaments absorbs oxygen
Gills-what fish use to breath
Operculum- keeps unwanted water out of gills
Swim Bladder- gas filled organ
maintains right amount of water for certain
water depths
-Their able to see in color unlike other fish
-They are the most diverse and numerous of all vertebrates
-over 20,000 species of fresh and salt water bony fish.
Fun Facts
Osteichthyes Rap
-Bony fish mostly reproduce externally
-some are hermaphrodite
-use eggs and milt
-A few species are unisexual
-internal reproduction is in some species but very rare
EX: Seahorses
Oviparous bony fishes-
release eggs

ovoviviparous fishes-
one parent fertilizes
egg in their body


viviparous fishes-
retains fertilized eggs in
their ovary or uterus
Unique Evolutionary Innovations/Effect on Organism

-only fish to have developed bones
-add diversity to water life
-control level of parasites and smaller fish in ocean
-are a source of food to humans and larger fish
-help keep the balance of diversity in the oceans
Full transcript