A review of Fish Movement A review of Fish Movement

Remember Remember what each of the what each of the

fish fins or fin pairs fish fins or fin pairs does?does?

Caudal (tail) fin-- provides thrust, and control the fish’s direction.

Pectoral fins-- act mostly as rudders and hydroplanes to control yaw and pitch.

Also act as brakes.

Pelvic fins-- mostly controls pitch. Also act as brakes.

Dorsal & anal fins-- control roll.

A review of A review of Trout External Anatomy Trout External Anatomy

Trout External AnatomyTrout External Anatomy

AHHHHH, more review!AHHHHH, more review!

Let’s continue Let’s continue

INSIDE INSIDE the troutthe trout

Internal Internal AnatomyAnatomy

Remember: we learnRemember: we learn

What the part is called (What the part is called (NameName) )

Where the part is (Where the part is (LocationLocation))

What the part does (What the part does (FunctionFunction))

Some internal parts of a fish are: Some internal parts of a fish are: StomachStomach EsophagusEsophagus HeartHeart LiverLiver IntestinesIntestines KidneyKidney Swim ( Air) bladderSwim ( Air) bladder Pyloric caecaPyloric caeca

(pn: (pn: Pie Low Rick See KahPie Low Rick See Kah)) Blood Vessels (veins and arteries)Blood Vessels (veins and arteries) BrainBrain ‘‘Ears’Ears’ Muscles**Muscles** Skeleton**Skeleton**

Remember: The skeleton is really Remember: The skeleton is really part of the internal anatomy.part of the internal anatomy.

Muscles are too!Muscles are too!

Trout Internal AnatomyTrout Internal Anatomy

Where is the:Where is the:

KidneyKidney

Intestine Intestine

SpleenSpleen

Blood Blood vesselsvessels

Where is theWhere is the

HeartHeart LiverLiver

Pyloric caecaPyloric caeca Stomach/ IntestineStomach/ Intestine

The fish heart has 2-chambers.The fish heart has 2-chambers.

What is this called? What is this called?

Air Bladder or Swim BladderAir Bladder or Swim Bladder

Fish’s brain locationFish’s brain location

BrainBrain

Trout brain (model) Trout brain (model)

Do fish have ‘ears’?Do fish have ‘ears’?

If they do, where are they?If they do, where are they?If they don’t, how do fish hear? If they don’t, how do fish hear?

Fish’s Inner EarFish’s Inner Ear

How the otolith worksHow the otolith works

X-ray view of a fish’s “otolith” X-ray view of a fish’s “otolith” (‘ear stone’).(‘ear stone’).

REVIEW! REVIEW!